A Detailed Look into the Vivosun VS4300 LED

A Detailed Look into the Vivosun VS4300 LED

Let’s take a look at Vivosun’s VS4300 LED Fixture. This review is divided into the following sections:

  1. Introduction
  2. Shipping and Delivery
  3. Specifications (OEM specification claims)
  4. Construction
  5. Our Measurements
  6. Discussion (comparing the supplied specification and marketing to our measurements)

Introduction

The OG patrons have done it again. An ancient tale of the folk living amongst us; providing the community with love and opportunity. And, as they repeat to us regularly, they are both beautiful and handsome.

image

What a handsome fellow.

In this thread you’ll find our completed evaluation but we were left with the question, what now? Well, there will be a lucky recipient of this fixture as LJ has said … let’s give it away!

Win three VS4300 lamps from VIVOSUN

With that, to the lucky dawgette, please read on to view the details and performance metrics for your fixture!

Shipping and Delivery

The fixtures we have received were overwrapped with a second box to help maintain the integrity of the inner box that actually contains the fixture … because, you know, the postal service can be gorillas at times.

Needless to say, the overwrap did it’s job and the fixtures arrived perfectly intact and ready for action.

Package Contents:


Power Supply, fixture in it folded configuration, cables, user guide, and some miscellaneous configuration sundries.

Specifications

The following are the manufacturer’s specifications for the VS4300 as taken from the Vivosun’s website and included user’s manual:

Dimensions and Weight (click to expand)

Length : 50.13 inches (127.3 cm)
Width : 27.6 inches (70.1 cm)
Width : 2.63 inches (6.7 cm) without power supply.
Weight: 24 LBS.

AC Power Consumption (click to expand)

Power consumption @ 120VAC : 3.58A
Power consumption @ 208VAC : 2.07A
Power consumption @ 244VAC : 1.79A
Power consumption @ 277VAC : 1.55A

Operating Environment (click to expand)

Temperature: 95°F (35°C) maximum
Orientation : LED emission facing down

Spectrum (click to expand)

image

Lifetime (click to expand)

LED expected output : L90: 54,000 hours
Warranty : 5 years


Construction

Mechanical

This fixture has a large mechanical footprint with a lighting area designed to fit within a 4ft x 2ft area.

Traditionally, I’m more familiar with the smaller, more modular fixtures and simply ran out of space to capture a full profile with the camera. It’s pretty big when unfolded relative to what I’m typically using. So, it’s taken me some adjustment to handle this thing without bashing myself in the head or knocking over my coffee. But it’s also clean, compact, and very much suitable for top-lighting style application with a profile that’s compatible with “standardized” citizen grow-op.

The fixture arrived folded into a clam shell arrangement thanks to 180 degree articulating hinges.

You’d simply fold open the the two half to access the full array of LEDs:

Due to the hinge, I could see some adventurous souls utilizing this for side-lighting project and wrapping their plants with a couple of these, as well. Hey, why not? A very intense side lighting, that is.

There are a total of four LED slats, or bars, equally spaced and fixed into place across the 4 by 2 foot frame. The distance between the individual bars is not adjustable and permanently affixed. This is somewhat sensible in that the control of the lighting spread and PPFD becomes a known quantity based on the optical engineering of the unit. What you do get out of fixtures that consume a large area with spread out LED elements is an even and consistent PPFD over the intended area.

Each bar is composed of an aluminum reflector shroud that also serves as a heatsink. This unit is passively cooled meaning there are no fans included to contribute to noise. Passively cooled fixtures will also add heat into space during operation. As with all passively cooled equipment, it is suggested that some amount of airflow exist to help move heat away from the fixture and to protect the LED componentry from excessive temperatures and to also consider heat rise when designing for an enclosed area.

Each LED PCB strip array contains 357 yellow/blue white LEDs along with 14 evenly spaced far red LEDs is mounted to each slat for a total of 371 LEDs. Across all four bars, this amounts to a total of 1484 individual discrete LEDs for this fixture.

Weather / Ingress protection / IP Rating

The VS4300 is IP66 rated. What this denotes is that the assembly has been tested for protection against and to safely operate in a specific environment. The two digit number “66” indicates the level of protection and follows the following format:

(6) No ingress of dust; complete protection against contact.

(6) Water projected in powerful jets (12.5 mm nozzle) against the enclosure from any direction shall have no harmful effects.

This is a nice feature potentially making this model useful in environments with hired personnel and greenhouse like conditions. The home hobbyist and DIY’er may scoff at this feature as being useless to them while others that have an eye towards safety will find this feature comforting against the occasional misdirected water spray.

Liquid Resistant Fittings

Throughout the design, Vivosun has chosen to employ liquid resistant electrical fitting and gaskets in areas sensitive to moisture intrusion.

Power Supply

Nearly 12 LBS in weight comprising an aluminum case wrapped in black plastic accents.

Dimming

The Vivosun VS4300 has a built-in dimmer switch that allows the fixture to be manually dimmed in several increments from100% to 40% of full output power. In addition, you can set the dimmer switch to external such that an appropriate external dimmer or control system can control the dimming via the rj-11 connectors.

Further, if you have more than one fixture, these can be daisy chained together by using the rj-11 style output connector for unified dimmer control.

Connectors

The included power input and output connectors utilize keyed and locking quick-connect style connectors.

LED PWB Construction

Conformal Coating

The PCB on each bar is conformally coated with a translucent siloxane type rubber. A number of OEMs have been applying conformal coatings on their PCBs over the last severals of years. An excellent development towards protecting the sensitive electronics. Vivosun did not skimp on this detail.

A conformal coat protects the LEDs and electronics from moisture intrusion and abrasion. The edges of the PCB laminate, however, does not appear to have a similar coating. In essence, this coating provides strong protection against the errant water spray but avoid submersing the fixture for any length of time. Yeah, I don’t know, I’m sure someone has tried it at one point.

Color Palette

The Vivosun VS4300 utilizes three different LED phosphors, white/blue, white/yellow, and far-red. There are no UV specific LEDs on this fixture:

White/Blue

White/Yellow

Far-Red

Ok, let’s power her on and turn a look-see:

Measurements

AC Power Consumption (no dimming)

Measurement Instrument : Fluke 43B Power Quality Analyzer (click for details)

Instrument : Fluke 43B
Type : Multi-meter
Measurement Range: Voltage 5.000V to 500.0V, Current 50.00A to 500.0kA
Accuracy: Voltage ±(1 % + 10 counts), Current ±(1 % + 10 counts)
Calibration Source : Manufacturer

Measurement Instrument : Pico TA189 Current Probe (click for details)

Instrument : Pico TA189
Type : Current Probe
Measurement Range: 0-30A
Accuracy: ± 1% of reading ± 2mA
Calibration Source : Built-In

Power Consumption Details (click to expand)

Average current draw (120.0VAC): ~3.91A RMS
Power Consumption Full Power (120.0VAC): 461W with a Power Factor (PF) of 1.0
Harmonic Content: 3.8% THDr

DC Power Consumption (no dimming)

Measurement Instrument : Fluke 43B Power Quality Analyzer (click for details)

Instrument : Fluke 43B
Type : Multi-meter
Measurement Range: Voltage 5.000V to 500.0V, Current 50.00A to 500.0kA
Accuracy: Voltage ±(1 % + 10 counts), Current ±(1 % + 10 counts)
Calibration Source : Manufacturer

Measurement Instrument : Pico TA189 Current Probe (click for details)

Instrument : Pico TA189
Type : Current Probe
Measurement Range: 0-30A
Accuracy: ± 1% of reading ± 2mA
Calibration Source : Built-In

DC Voltage and Current Draw

Not measured.

Power Consumption (click to expand)

Not measured.

Calculated Supply Conversion Efficiency: Not measured.


Temperature (no dimming)

Measurement Instrument : Flir A65 Thermal Camera (click for details)

Instrument : Flir A65
Type : Thermal Camera
Measurement Range: -25°C to 135°C (-13 to 275°F) / –40°C to 550°C (-40 to 1022°F)
Accuracy: ±5°C (±9°F) or ±5% of reading
Calibration Source : Dahua black body radiator @ 35°C

Operating Temperature

Power supply case initial thermal measurement: 71.2°F (21.8°C)
Power supply case at 8.0 hours: thermal measurement 121.2°F (49.6°C) @ 71.7°F (22.1°C) ambient
Heat sink fin at 8.0 hours: Surface Probe 120.7°F (49.3°C)

Thermal Image of Operating Assembly LEDs (click to expand)

Fixture thermal image (partial slat), false color image, @8.0 hours non-dimmed



image

Hotspots observed with temperature differential on the order of 10’s of degrees Fahrenheit.

Thermal Image of Power Supply Assembly (click to expand)

Power supply thermal image (from top), false color image, @8.0 hours non-dimmed

A steady state temperature was measured at full output power utilizing a infrared camera. A black body radiator set to 95°F (35°C) serves as a temperature reference source (shown in upper left corner of image below). Electrical tape strips serves to provide a known surface emissivity reference of 0.95.

(Blue = Ambient, Orange = Black Body, Red = Power Supply)


Lighting Metrics

Spectral Power Distribution (SPD)

Measurement Instrument : Stellarnet CXR-SR-100 (click for details)

Instrument : Stellarnet CXR-SR-100
Type : Spectrometer
Bandwidth : 220 to 1100 nm
Resolution : 4 nm
Optical Fiber : F600 VIS/IR
Sensing Head : Cosine Corrected Adapter CR1
Calibration Source : Stellarnet SL1-CAL (300-100nm) Tungsten-Halogen Lamp

18 inches from fixture, open air, center spot, 30 minutes to stabilize (click to expand)

Center Point, Open Air Measurement:

<<< Photo, In Progress

Spectrometer and Quantum Sensor Cosine Heads:

<<< Photo, In Progress

Spectrometer Electronics:

Blue(400 - 500nm) : 21.31%
Green(500 - 600nm) : 42.32%
Red(600 - 700nm) : 36.37%
Total :100%

UVB(287-320nm) : 0.01%
UVA(320-400nm) : 0.13%
Violet_Blue(400-475nm) : 15.21%
Cyan_Green(475-550nm) : 22.69%
Green_Yellow_Red(550-700nm) : 59.78%
FarRed_NearIR(700-850nm) : 2.19%
Total :100%

Spectrum Plots

Captured Spectrum

PAR / YPF overlay

Radiant Energy and Ratios

The following metrics details the measured radiant energy 18 inches from the fixture, open air (no nearby reflective walls), center spot (at the center of the fixture), after allowing at least 30 minutes for the fixture to stabilize:

Integral radiant (400-700nm): 179.9 W/m2
Integral radiant (350-840nm): 183.0 W/m2
Lumens (m^2) : 54821
Spectrometer PFD (400-700nm): 837.75 umol / m2 / s
Spectrometer PFD (350-840nm): 856.39 umol / m2 / s
Quantum Sensor PFD (400-700nm): 844.7 umol / m2 / s
YPF (360-760nm) : 728.5 umol / m2 / s
YPF/PFD: 0.87
PSS: 0.85
DLI index [12 hours] PAR : 36.2
Note: The traditional PAR range is defined as being 400nm-700nm.

These types of units are intended for close-in use and, as such, is specified for a recommended minimum height above canopy at 6 inches. I find this to be absurdly close but for those who do so:

Spectrometer PFD (400-700nm): 1280.9 umol / m2 / s @ 6 inches.
Quantum Sensor PFD (400-700nm): 1288.6 umol / m2 / s @ 6 inches.

Output Stability

Output power as measured with the Apogee Quantum Sensor over an ~140 minute period from power-up shows a small amount of variation of ~3% as the unit heats up. Measured 18 inches from fixture, open air, center-point.

Variation (click to expand)

Output Stability Plot: Delta 910 to 887 umol / m2 / s PAR @ 18 inches. Ambient temperature 71.4°F (21.9°C).

image

Color Quality

The following details how the human eye will perceive colors that are illuminated by the fixture. This has little to do with the quality of light as perceived by the plant but rather how easy it is for humans to discern colors or how accurate the colors in a photograph under illumination will appear.

Chromaticity 3319K (click to expand)

CCT: 3319K
Chromaticity Coordinates: (x=6.28, y=5,78)
Dominant Wavelength: 585 nm
Purity: 33%


PPFD PAR Map

The following graphs illustrates the PPFD in the PAR range as measured over the suggested 4ft x 4ft area with reflective walls. These graphs are useful to determine the amount of intensity variation that may be expected over the suggested grow area at specific hanging heights.

Measurement Instrument : Apogee Instruments SQ-250 (click for details)

Instrument : Apogee Instruments SQ-250
Type : Quantum Sensor
Bandwidth : 389 to 692 nm ±5 nm
Resolution : 0.1 µmol*s / m^2
Sensing Head : 2PI Cosine Corrected
Calibration Uncertainty : ±5%
Calibration Source : Manufacturer Calibration
Source Correction Table :

PAR Map @6 Inches (click to expand)

PAR Map @12 Inches (click to expand)

PAR Map @18 Inches (click to expand)


Manufacturer’s Warranty

Five Years.


Definitions

Spectrum and Lighting (click to expand)

PAR - range of photosynthetically active radiation. Unless noted otherwise, typically 400-700nm. This is the most common range utilized when describing horticultural lighting although there are wavelengths outside of this range that are also sometimes considered. If so, the wavelength should be defined. It is common to see PAR used interchangeable with PPF as a metric of power over 400-700nm.
PPF - Integral power across the PAR range of wavelengths.
SPD - Spectral power distribution. Absolute photon flux as measured across the spectra. A spectrometer will measure photon flux in discrete “bins” of frequencies. From these “bins”, one can calculate the total power across the spectrum or power within a narrow band of frequencies. (e.g. power in the blue spectrum). The spectral graphs generated from a calibrated spectrometer details SPD. An uncalibrated spectrometer generates spectrum distribution but would not contain accurate power information (just relative power).
YPF - yield photon flux. Weighted photosynthetic yield measurement across 360 to 760nm.
YPF/PPF - the ratio between the PAR and YPF calculations. This metric exposes how closely the overall light output in the PAR region targets the traditional quantum efficiency curves. The closer this is to one, the closer of a match. This metric is bit of an oddball. Matching an efficiency curve with the intensity output makes some sense in that your targeting more efficient conversion but such matching doesn’t necessarily address what ratios the plant actually needs under various circumstances. However, it appears that this metric is utilized by some OEMs to design their spectra and they have been relatively successful. Adding more green, for instance, will show a decrease in this ratio.
PPE or PSS - estimated phytochrome photoequilibrium. Also termed PSS. This is the ratio of Pfr to Pr. Pfr : ( Pfr + Pr ) where Pr is the photon flux integral across 600-700 nm waveband (red). Pfr is the integral across the 700-800 nm waveband (far red). PPE is an acronym that is also used when describing lamp efficiency (see below). Try not confuse that in this context.
PPE - Photosynthetic photon efficacy. This is another definition of PPE. It is a relative ratio of the input power that is converted to usable photons. The higher the number, the higher the efficiency of the lamp.
DLI index : the integrated amount of PAR light your crop would see over the period of a 12 hour day under the test conditions.

Notes:

PAR (PFD) can be misleading if you are not paying attention. The standard for PAR is between 400 and 700nm. For non-traditonal “McCree” spectra, the PAR measurement may not capture the majority of the power. For example, UV and far-red will fall outside of the PAR spectrum though there are good reasons to consider implementing a lighting strategy that includes these spectra. YPF has a broader range but is weighted (by committee) depending on the photosynthetic action spectra. While this might be valid, it can be confusing if you are looking for raw irradiance values that are not weighted. The integral radiance numbers are the raw radiant power measured and can be converted to umols by using an estimated conversion factor such as 4.2 or by converting each wavelength bin to equivalent photons (mols) and then integrating over your desired range.

P.S. the coloring of the spectrum graphs are artificial. The actual colors may not perfectly line up with what would be perceived but is instead simply meant as a guide to the general color red/blue/green/etc.


40 Likes

Continuation and Discussion on the Vivosun VS4300 LED Fixture.

Discussion

How does the supplied specification measure up to the results we are seeing?

:white_check_mark: Number of LEDs

Specified : not specified
Measured : 1484
Comments: Mixture of blue / yellow / far-red phosphors.

:white_check_mark::warning: Power Consumption @ 120VAC Full Power

Specified : 430 Watts
Measured : 461 Watts
Comments : 7% over specified rating. Not significant or unheard of but be aware.

:white_check_mark: Power Factor

Specified : >95
Measured : 100
Comments : Perfect.

:white_check_mark: Temperature

Specified : not specified
Measured : 121.2°F (49.6°C), Heat Sink Fins@120.7°F (49.3°C), Ambient@71.7°F (21.9°C)
Comments : Temperatures are safe to the touch (ASTM C1055 <140oF) with low fire risk potential.

:white_check_mark: Spectrum

Specified :
image [1]

Measured :

Comments : We measure less red as compared to the Vivosun literataure. Although, the far red LEDs are relatively sparse producing greater variation in red energy across the area of interest. The amount of captured red is likely sensitive relative to the location of the far-red LEDs and the spectrometer particularly when measured at 6 inches. In essence, horseshoes and hand grenades. Close enough for comfort.

You can find some comparative spectra for other fixtures and lamps that we’ve measured in the past, here:
Lighting Spectral Data

:white_check_mark: Radiant Energy

Specified : 1200 umols/m2/s
Measured : 1280.9 umols/m2/s open air (400-700nm) at 6 inches centerspot.
Measured : In Progress umols/m2/s open air (400-700nm) at 6 inches averaged.
Comments:

The are differing definitions of flux where it is either defined as total flux or flux density, as such it is not always clear what is being referred to when stating PPF. Vivosun does not specify measurement conditions or provide values under actual real-world conditions but has provided a fixture document:


The center spot measurement at 6 inch height exceeds the specification slightly and, as such, we make an assumption that the literature specification is also for 6 inch hanging height. If true, this fixture is one of the few that actually meet or exceed the specified claims although the manufacturer does not explicitly detail the operating environment.

:white_check_mark: PPE

Specified : 2.8 umol/J @ 430 Watts
Measured : 2.78 umol/J @ 461 Watts
Comments : Using center spot measurement, excellent.

:white_check_mark: PAR Mapping

Specified : average PPFD of xxx umols/m2/s per marketing materials
Measured 6 Inch Height : In Progress

Measured 12 Inch Height : In Progress
Comments : In Progress

:white_check_mark: Chromaticity

Specified : not specified
Measured : 3319K
Comments : This unit has a high CRI for a horticultural fixture.

Things we didn’t specifically measure but could use your help with filling in some of the details:

Ingress Protection (click to expand)

We didn’t measure against the IP66 rating. There are three primary engineered features that address the IP-66 ingress protection

  1. Conformal Coating
  2. Watertight electrical interconnects
  3. IP-66 rated power supply

I’m not really familiar with this type of conformal coating but here I’ll note a couple of potential advantages and disadvantages:

  1. Advantage : Moisture / humidity and dust protection.
  2. Advantage : Some protection from accidental contact with live (DC>19V) voltages.
  3. Advantage : Mild impact protection.
  4. Advantage: Relatively easy to clean.
  5. Advantage : Diffuses / spreads the light energy to some extent.
  6. Disadvantage : May absorb a small amount of the light energy. Unclear if it absorbs UV.
  7. Disadvantage: Difficult to DIY rework / repair.
  8. Possible disadvantage: Depending on the chemistry of the coating, there could be long term yellowing / hazing of the clear coating. It is also unclear if, overtime, heat will allow foreign material to bond to the coating.
  9. Disadvantage: While being easy to clean, it is at the same time also more difficult to clean. The surface is “grippy” and tends to hold onto particles. For this particular unit, despite having wiped it several times, dirt particles tend hang around. The particles are not bonded in place, it’s just a grippy surface.

For UV, this paper tends to indicate that most silicone resin conformal coatings are resistant to UV aging,
https://smtnet.com/library/files/upload/conformal-coating.pdf

Length and Weight (click to expand)

Specified Length : 50.13 inches (127.3 cm)
Specified Width : 27.6 inches (70.1 cm)
Measured Length : 47.75 inches (121.3 cm)
Measured Width : 27.75 inches (70.5 cm)
Comments : We lost ~2.5 inches in length somewhere.

Warranty (click to expand)

Five year warranty stated in advertisement but details on the warranty terms could not be determined. Elsewhere, Vivosun notes warranties for up to 12 months.
https://vivosun.com/pages/vivosun-warranty
https://vivosun.com/products/vivosun-patented-design-vs4300-led-grow-light

Summary

Well then, this took a bit longer than expected as several of my test instruments decided to go borked just in time for the springtime festivities. As a result, there were some items of interest that we could not collect data on this go-around. But, we were able to collect some good data despite the unruly kids within the test collection.

The efficacy numbers as calculated using the centerspot method for this unit are excellent at 2.78@461W. We did not measure the power supply conversion loss as we would have to modify the supplied cabling. Since this unit is to be provided to an OG patron, we opt’ed to be non destructive. Based on this wall plug result, we would expect the PPE of the actual LED assembly to be even higher. But that measurement is not really useful for real-world use unless a more efficient power supply is utilized. For the published numbers, this is perhaps the first time we’ve actually calculated an efficacy number that actually matches the advertised rating for a centerspot measurement. Kudos Vivosun.

One of the unique features of the VS4300 fixture is that the light energy is spread out over a large area. Other units that have smaller overall footprint but similar centerspot performance numbers will fall short for uniform intensity over the grow space. We can expect a significantly more uniform intensity for such such fixtures over the specified footprint of the fixture. While Vivosun is marketing this for a 4x4 foot area, the overall metrics tend to suggest that this is ideally suited for around a 4 x 2 foot area for plants or slightly larger. This ensures a relatively strong and consistent light intensity across the canopy. If you have a larger tent, say something around 5x5 or greater, two of these fixtures could be an excellent solution.

This photosynthetic flux is sufficient from veg to flower.

We’ve extrapolated the 4 foot x 4 foot captured data to extend the PAR map into a larger 8 ft by 8 ft area. The values within the 4 x 4 foot area are the measured values. Values that fall outside of the measurement area utilize multiquadratic estimation to extrapolate values. This particular method employed is not for accuracy but more for an intuitive visualization of how the light spreads as the hanging heights are varied. The following are some plots at the three hanging heights:

Six, Twelve, and Eighteen Inch Heights (click on these for a better view):

We did not utilize surrounding reflective walls for our measurements with some of the produced light energy lost into the surroundings. The calculated PPFD for this open air scenario at various heights are indicated in the plots illustrated above. As such, we do not calculate the efficacy taking into account the intensity variations across the measurement area but it is expected to be less (relative to the centerspot measurement). To provide an example of how reflective walls contribute to flux within the measurement area, the following is a plot where we added a single reflective wall along one side of the measurement box (wall along bottom):

The power supply provided by Vivosun is large … and heavy weighing in at approximately 12 lbs US. Taking a hint from Fluence, the supply electronics are entirely enclosed with moisture resistant seals employed throughout. As there are no ventilation holes, the electronics are wrapped in a heavy aluminum housing that also serves as a heatsink. The input AC and the output DC connectors are keyed to prevent accidental miss-wiring. The primary connectors chosen by Vivosun are push to connect locking connectors. This is the first time I’ve seen such locking connectors employed on such horticultural fixtures (other than what we’ve built here an OG). These are very easy to use, secure, and a nice feature.

The external dimming is an excellent feature useful to those who utilize external controllers or automation. Daisy chain capability allows the user to control multiple fixtures from a single controller. Unlike the quick-connect locking connectors utilized elsewhere, the external dimmer connectors are the typical RJ-11 style modular plugs.

The RJ-11 connectors do feel a bit out-of-place when compared to the quick-connect connectors and overall robust design of the power supply. I’m guessing that a design choice was made to enable the utilization of current controllers on the market that also utilize a similar style of interconnect. Hopefully we’ll see that connector style upgraded within the industry sometime in the future.

The default configuration for the fixture is such that the power supply is intended to mount on top of the LED frame with a short DC cord interconnect. Also included with the fixture contents are power supply hanging cables such that the supply can be mounted elsewhere. The included DC extension cable is approximately 3 feet with the DC pigtail on the fixture itself approximately another couple of feet. It is not clear if additional extensions with the quick lock connectors are available to extend the reach further. Under test, the outer case temperature of the supply measured at approximately 121.2°F (49.6°C) with ambient temperatures at around 72°F (22°C). This would feel hot to the the touch but safe per ASTM guidelines (<140°F). Likewise, the heat sink fins measured 120.7°F (49.3°C) after operating for 8+ hours. Users should assume that the temperatures will increase slightly as the ambient temperatures increase. While the heat generated is modest when comparing to HID, as usual, it’s probably a good idea to consider placing the power supply somewhere external to the grow area to limit the additional heat load.

The supply is an universal auto-ranging supply which means that these units can be utilized around the world between 120 - 277VAC with the appropriate line cord. This supply is not rated for 480V that is sometimes required by commercial folk.

As a side bar, small details can say a lot. The included power and DC extension cables are UL marked and have a marked rating of 105°C. This would be considered a premium component as the OEM could have squeezed a couple of pennies and opt’ed for the more common (and cheaper) 90°C rated cables. There are a number of details not mentioned here that simply increase confidence in this fixture. There’s always room for improvement for any product but there’s not much to complain about here particularly at this price point.

The warranty is a bit of a mystery. Vivosun’s marketing material notes 5 years but we were unable to determine specifics on the coverage.

The industry players have really been stepping up their game. Vivosun’s VS4300 is no exception. We’ve seen significant design improvements from a number of the well known players ranging from form&fit, quality, light intensities, efficacy, safety, spectrum, and features. The gap between the lower-end and the higher-end seems to be shrinking and, in some cases, the primary determinate has become cost and warranty. This should lead to a healthy dose of competition and it signals this is a good time to keep an eye out for LEDs fixtures for your next OP.

If Vivosun’s warranty provides strong coverage, this unit should be a running contender for those looking for a fixture to cover a four by two foot footprint with very good metrics. The reduced footprint also makes for greater flexibility than the larger four by four foot fixtures. However you’re planning to set-up your grow OP, keep in mind to verify the available space based on the overhead dimensions of this fixture since the width is slightly larger than 2 ft.

With the quality output metrics, this fixture seems to hit a sweet spot for use within a non-CO2 enriched environment.

Cheers…


45 Likes

That’s alot of work put into this review good work @Northern_Loki

15 Likes

Very detailed review, thanks. Northern_Loki never disappoints :+1:

4 Likes

Great review! This is an extremely thorough look at the light up for grabs. I was wondering about the specs and they’re all laid out. Thanks :slight_smile:

5 Likes

Keep an eye out for the PPFD mapping. OP will be updated in the next day or so.

7 Likes

Very nicely done NL, thanks for doing this :slight_smile:

2 Likes

Great review @Northern_Loki! I love your layout. I can easily read as much, or as little detail as I want.

:+1: :+1:

3 Likes

wow @Northern_Loki you werent joking when you said “detailed” i need to re-read for content now.

5 Likes

You DID say details!
Makes me want it even more !
Thank you for the opportunity and details @Northern_Loki

3 Likes

wow wow wow, the specs on this thing are really impressive. i like the amount of blue spectrum this is putting out, this is a great looking light, should be a great addition to anyones setup!

3 Likes

I’ve both read and written such reports for 40 years and this is among the best I’ve had the privilege to lay eyes on, well done!
:+1: :sunglasses:

Am I seeing blanking plugs in the RJ11 jacks in the photo?

Cheers
G

8 Likes

Great write-up, thanks for that. Pretty swanky light too! :v:

3 Likes

Okay now I REALLY HOPE I WIN!!! :open_mouth:

3 Likes

That would be a very nice addition for someone’s garden. Thank for the info @Northern_Loki

2 Likes

Thanks. They are removable rubber sealing plugs. Not loopbacks or anything like that.

5 Likes

Looks like a very quality product. Thanks for taking the time to show us!

1 Like

Nice Writeup. very detailed.

1 Like

Incredibly detailed as always! I sense a healthy dose of perfectionism there. :nerd_face:

You are a rock star of scientific lighting reviews!

8 Likes

Thanks @Northern_Loki!! Awesome review!!!

1 Like