Straight from Grow Light Science…
PPFD Levels
2’ x 4’ Reflective Wall Area
Mounting Height = 20"
Average PPFD = 1,038 umol/m2/s
I’m set at 17" distance. Light at level 10 for a while just to set in. Light on all day at level 7.
17" from bottom of lamp to bottom of Gorilla CFM Kit front and rear bars.
All my measurements taken with Uni-T and PPFD app. 2x4 Tent completely zipped and closed aside from center zipper open just enough to fit my arm thru to position Uni-T sensor to obtain readings all over the tent.
So, I’m getting only 800+ at 17" Distance to canopy. At the outer sides, it goes down to 600ish and in corners it maintains 500+. This is NOT enough to push these plants the way I want.
No Way this lamp is putting out 1060 ppfd at 20" - Best Im getting at 17" is 800 ppfd.
Unless something is fucked on my end…Really need to get to bottom of this.
I noticed this on my last grow as well. Never had the chance to test out the current draw after last grow. Will for sure after this grow is done.
Next grow for sure going back to my HLG350R. Its a fucking animal.
If current draw is low, that could explain it. I believe GLS’s Par map for coverage, but it doesnt even happen unless its at thier stated 20" hang height. Im at 17" and its not on par (no pun intended 
)
If this lamp were hung at 20", in its current condition in my tent it would only put out max 600-700 PPFD, I believe.
2x4 tent is currently set up in the photos shown, I’m at level 10 on lamp & max PPFD I’m pulling is just barely over 800 in the center and just off center, then tapers to 600 ish to the very sides and just over 500 in the corners.
Not terrible, but not the numbers I’m looking for and if I lower the lamp or let the plant grow in to it, I’ll never get the power I paid for.
Def testing after this run and putting the HLG back in service. May be reaching out to Grow Light Science.
Mixed 10 gallons of RO water with Athena Blended full-strength Vegetation formula (in this 2nd week of flower)
Fed 5 gallons to them today and have 5 more mixed and ph’d at 6.1. Its good in that state for one week, per Athena.
Also gave them a “Fooping” earlier this morning.
Light is now officially set to level 10 at 17" distance. They are getting some decent light for this phase of flower, and with the supplemental lighting are getting the lower stuff decently as well.
Based on what this Grow Light Science light is doing, I think I’m going to test my HLG350R and see what it’s putting out, just to be sure I don’t have a problem here at the house.