seaslug
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Sea, When iwas trying to calculate the efficiency of the driver i simply added the vf of the pair of 72v cobs and approximated that i was around 90% efficient. Im wondering if my math makes no sense at all. I was using the attached graph.
Just be careful with the 350ma and 500ma because they can kill you if you get shocked.I think you're only doing the first step. Say there is 144Vf total on our string of LEDs. How do you read the Mean Well efficiency chart? We need to know what the fraction of total power is, expressed as a percentage of total allowable load. The maximum (constant current region) voltage for the HLG-120H-C700 is 215V. In this example, the load would be 144V / 215V = 67% Looking at the chart you provided, this puts the driver efficiency at just over 92%.
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I think you're only doing the first step. Say there is 144Vf total on our string of LEDs. How do you read the Mean Well efficiency chart? We need to know what the fraction of total power is, expressed as a percentage of total allowable load. The maximum (constant current region) voltage for the HLG-120H-C700 is 215V. In this example, the load would be 144V / 215V = 67% Looking at the chart you provided, this puts the driver efficiency at just over 92%.
View attachment 529023
no 390nm for UVB? will trichs be sad?Sketch of independent deep red circuit:
(Oh, imagine the red stars in series on the 700mA PSU.)
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I'm curious as well...no 390nm for UVB? will trichs be sad?
i've been reading conflicting articles about supplementing UV lighting . . . to UV or not to UV?The plan now is two 72V 3000K CXB3590 with a 36V 4000K CXB3070 in the middle, driven by HLG-185H-C1050A. I was going to use 5000K in the middle but I bought some efficient 4000K from Cutter in Australia (discount code CUTANDROLL). Shining a blue spike in the middle of each plant but I really don't care about trichs--I don't sell and I don't make pollen hash.
I've been undecided where I'll be living--looks like I'll get back to gardening now. :)
UVB 290nm-310nmn is a very narrow bandwidth Thee are plenty of LED's that address UVA/UVC but not UVB directly. UVB is suntan rays, or sunburn rays. UVA/UVC kills bacteria, blue light. There are no/few LED's out there that meet that narrow bandwidth frequency. but there is a fluorescent light for reptiles that is a 48" unit costing about $30 each tube for a two tube fixture. One tube is adequate for 10 SF area. peacei've been reading conflicting articles about supplementing UV lighting . . . to UV or not to UV?
I would go with a 5.66 x 18" with a 1400mm fan active cooling. Passive cooling would be closer to 36" same profile. Peacewould a 4.6" x 4" of the serrated fin be as good passively as 3.5" x 32"? was wanting to try 1.8" x 40", using 3 luna 100 3500k flip chip opto powered by M. W. hlg-240h-c1400a, spacing them 20" apart from the middle and 10" from the Edge. enclose in polycarbonate fixture, with one fan on each end. which would cool better any ideas?
i just burned my plants with cob lights . . . again : (
what lights you burning with....pics mate.how close to canopy you got em?if I get my panels too close by an inch or two ,I get burn or dis coloured leaves.two weeks later after thinking I got lock out.then the burning tops become clear.nightmare.i just burned my plants with cob lights . . . again : (
i don't have any reflectorsDitch those reflectors ;)
E they diy,or off shelf cobs?i don't have any reflectors
what lights you burning with....pics mate.how close to canopy you got em?if I get my panels too close by an inch or two ,I get burn or dis coloured leaves.two weeks later after thinking I got lock out.then the burning tops become clear.nightmare.
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