So I did some digging and found this:Yeah much less than I would expect.
How far are they from the substrate?
And I am guessing the 420 is lower PAR than a G. Super Purple. I have never tested the Agromax bulbs, so have no clue there.
Speaking of brand new, the Geisemann Super Flora measured the other day when it was new, PAR hasnt changed at all now in 4-5 days. Still the same as day one. So maybe the typical 'burn-in' period can vary by brand or depend on the manufacturing process...or something. Or maybe this bulb I got...
The Pure Bloom is the PAR killer. I am 26 total inches from lights to substrate.
Do you happen to know what the 660 is for output? I imagine higher than the 12 I got...
Maybe to start adjusting the tank I'll remove the pure bloom and put another super flora in there.