OneHitDone
Well-Known Member
First thanks to Supra and others who had input on this topic in the other thread.
My question is the Inda-gro 420 w/pontoon in a 5'x5' space - From the numbers I work around I come up with 164.3 PPFD Averaged in that space?
Suppose I where to build a pair of 4' long heatsink/cob "pontoons" to go on each side of the 420 fixture, what COB / Driver Combo would give enough output to bring things up to "PAR" in that size space with max intensities?
Thanks @alesh ! A lower LER than I expected. So if we go by their claim umol/S, we get: 1.4/4.59 = 30.5% efficient. But if we go by their lumen data 59lumen/W / 235 LER = 25% efficiency. So if we average it and go with 28% efficient, here is where we are:
Indagrow 420 in a 4X4 (without pontoon)
378W * .28 = 106 PAR W
106 * .7 reflector loss = 74 PAR W (reflector penalty may be higher in practice)
74/16 = 4.63 PAR W/ft²
4.63 * 4.59 umol/s/W = 21.25
21.25 * 10.7 = 227.4 PPFD averaged
Indagrow 40W pontoon
36W * .3 = 10.8 PAR W
10.8 * .9 lens loss = 9.7 PAR W
9.7/16 = .61 PAR W/ft²
.61 * 5.5 umol/s/W = 3.36
3.36 * 10.7 = 35.9 PPFD averaged
↑
Supra, do you possibly have any info how the inda-gro 420 with pontoon specs out in comparison?
So to answer your question:
Indagrow 420 in a 4X4 with pontoon:
227+35.9 = 263 PPFD averaged
Indagrow 420 in a 3X3 with pontoon:
468 PPFD averaged
My question is the Inda-gro 420 w/pontoon in a 5'x5' space - From the numbers I work around I come up with 164.3 PPFD Averaged in that space?
Suppose I where to build a pair of 4' long heatsink/cob "pontoons" to go on each side of the 420 fixture, what COB / Driver Combo would give enough output to bring things up to "PAR" in that size space with max intensities?
Thanks @alesh ! A lower LER than I expected. So if we go by their claim umol/S, we get: 1.4/4.59 = 30.5% efficient. But if we go by their lumen data 59lumen/W / 235 LER = 25% efficiency. So if we average it and go with 28% efficient, here is where we are:
Indagrow 420 in a 4X4 (without pontoon)
378W * .28 = 106 PAR W
106 * .7 reflector loss = 74 PAR W (reflector penalty may be higher in practice)
74/16 = 4.63 PAR W/ft²
4.63 * 4.59 umol/s/W = 21.25
21.25 * 10.7 = 227.4 PPFD averaged
Indagrow 40W pontoon
36W * .3 = 10.8 PAR W
10.8 * .9 lens loss = 9.7 PAR W
9.7/16 = .61 PAR W/ft²
.61 * 5.5 umol/s/W = 3.36
3.36 * 10.7 = 35.9 PPFD averaged
↑
Supra, do you possibly have any info how the inda-gro 420 with pontoon specs out in comparison?
So to answer your question:
Indagrow 420 in a 4X4 with pontoon:
227+35.9 = 263 PPFD averaged
Indagrow 420 in a 3X3 with pontoon:
468 PPFD averaged