LED question for a guy that has not grown in 17 years

[Northern_Loki]

While not the most inexpensive option, Fluence Bioengineering has a good reputation along with several ready-to-go footprint options that allows you to plan for future expansion.

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edit: we have measured the spectra for at least a couple of their offerings (what I had available). The offered specs do appear to match up well with what they are claiming in regards to PAR output. Vyprx Plus Greenhouse Spectrum and a couple of the Ray series were evaluated. Some additional info is in this thread:

Lighting Spectral Data

Overgrow Independently Measured Lamp Spectra Methods and descriptions Measurement device: Stellarnet CXR-SR-100 w/ CR2 Cosine Adapter. The measurements in this thread are single point, 18 inches from the center of the light source. This is for consistency and is the most relevant metric for verifying/comparing against manufacturer specifications. It is a direct measurement. This thread is namely to capture the spectrum distribution for various lamps which will be consistent over the illumin…

And, this thread on some of the Fluence offerings:

New Fluence lights!

SPYDR 2x, SPYDR 2p, and SPYDR 2i. Remotely mountable power supply and improved specs. Still not cheap, though. SPYDR 2x and SPYDR 2i available really soon. Fluence Bioengineering SPYDR 2p Specifications Comparison Sheet