This is nothing scientific, Just a comparative assessment of the different fixtures with a light meters' "Foot-candle" measurment:
Old school T-8 shoplights with one red and one blue bulb each, 6x of them @ 1'
Similar fixture, different room, over vegging plants [for comparison]
8 bulb T-5 fixture @ 1'
Inda-Gro @ 1'
Didn't even realize till now, that I never did a measurement under one of the 1000w's, only this 600w HPS.. The light-meter read "overload," and I had to switch the scale to kFc [Kilofoot-candles] as you can kind of make on on the display.
Old school T-8 shoplights with one red and one blue bulb each, 6x of them @ 1'
Similar fixture, different room, over vegging plants [for comparison]
8 bulb T-5 fixture @ 1'
Inda-Gro @ 1'
Didn't even realize till now, that I never did a measurement under one of the 1000w's, only this 600w HPS.. The light-meter read "overload," and I had to switch the scale to kFc [Kilofoot-candles] as you can kind of make on on the display.