Ok so I just finished building my qb setup.
12x qb288v2 on 3x hlg-320h-c1400b (single fixture for a 4.3' x 4.3')
12 qb288v2's @ 1400ma should be 12*66.78 = 801.36w
I've wired the power cords together, and I've wired the dimming leads together.
I had a 25k ohm pot laying around so I wired it in (knowing that I need 33k ohm pot to have full range dimming for 3 drivers)
Initial startup was ~720 watts. Left it running for a bit and it settled at 700w. heatsinks are barely warmer than ambient temps, drivers are slightly warmer than heatsinks. Turned the knob all the way down, was ~65w before they shut off completely. One thing I noticed was the fixture still pulled ~5w when they were dimmed to off.
I ordered the "cased potentiometer" from rapid led because I asked them through email if they had a 33k ohm version of their cased pot, or if they could do a 30k ohm with a 3k resistor (or anything that would give me full range of my 3 drivers being dimmed with one pot) They said "resistance is variable on the cased pot so one cased pot will work for three drivers"
So yesterday I tried to swap out my 25k ohm pot with the cased one from rapidled, and the fixture doesn't turn on. I tried all 3 of the pot's they sent me, none of them worked. Put the 25k ohm back on and it turned on back to 65w-700w again.
Will get some par readings with the apogee mq-200 probably next week.
700w @ 2.77 board level = 1939 ppf
4 boards per hlg-320h-c1400b is 190.8/229 = 83.3% driver voltage being used.
how do I calculate/estimate the driver loss for this setup in order to determine the umol/J system level?
12x qb288v2 on 3x hlg-320h-c1400b (single fixture for a 4.3' x 4.3')
12 qb288v2's @ 1400ma should be 12*66.78 = 801.36w
I've wired the power cords together, and I've wired the dimming leads together.
I had a 25k ohm pot laying around so I wired it in (knowing that I need 33k ohm pot to have full range dimming for 3 drivers)
Initial startup was ~720 watts. Left it running for a bit and it settled at 700w. heatsinks are barely warmer than ambient temps, drivers are slightly warmer than heatsinks. Turned the knob all the way down, was ~65w before they shut off completely. One thing I noticed was the fixture still pulled ~5w when they were dimmed to off.
I ordered the "cased potentiometer" from rapid led because I asked them through email if they had a 33k ohm version of their cased pot, or if they could do a 30k ohm with a 3k resistor (or anything that would give me full range of my 3 drivers being dimmed with one pot) They said "resistance is variable on the cased pot so one cased pot will work for three drivers"
So yesterday I tried to swap out my 25k ohm pot with the cased one from rapidled, and the fixture doesn't turn on. I tried all 3 of the pot's they sent me, none of them worked. Put the 25k ohm back on and it turned on back to 65w-700w again.
Will get some par readings with the apogee mq-200 probably next week.
700w @ 2.77 board level = 1939 ppf
4 boards per hlg-320h-c1400b is 190.8/229 = 83.3% driver voltage being used.
how do I calculate/estimate the driver loss for this setup in order to determine the umol/J system level?
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