eyderbuddy
Well-Known Member
what's the highest wattage a board like this can be run at without a heatsink? anybody?
what's the highest wattage a board like this can be run at without a heatsink? anybody?
Say i just bolt it to a few aluminum L-channels just to hold the board... Are you saying i could be running one of these at 100W with only just enough aluminum to keep it in place and no actual dedicated "heatsink"?You want to attach it to something firm. or they will bend, so some heatsinking is almost always going to come into it.
A 288 LED board should be able to do 100 to 108W depending on ambient temps. That being said, I think we are talking ambient that would kill your plants.
What wattage for the whole setup? How many watts is each board running at?both my Meanwell driver and heatsink from 2 x qb-304's are too hot for me to touch for more than a split second
I think so, I am just using cheap channel, I think they use it to hide cables next to the wall...Say i just bolt it to a few aluminum L-channels just to hold the board... Are you saying i could be running one of these at 100W with only just enough aluminum to keep it in place and no actual dedicated "heatsink"?
I'm trying to compare them to BX & Samsung strips, jic.
Are those the china ones or originals?both my Meanwell driver and heatsink from 2 x qb-304's are too hot for me to touch for more than a split second
The official 260w kit consists of two boards on one of those drivers. With driver loss they run at 285w at the wall. 2 sets shits all over a 600w hps. They are supposed to be equal to 500w of HPS per kit. If they are I don't know because I don't own a sphere, but they defo shit all over a 600w HPS between them.I've been checking out different drivers and I think I might have figured it out. Two hlg 240 c2100a running two boards. If I understand it right, at max voltage for two boards 120v x 2.1a= 252w so 126w per light roughly. That would put the light around 500w. Or a couple 240 1750 for around 400w and drive the boards a bit softer. I figure if a hlg 550 Can replace a 1000w hps, 400 to 500w of these very similar off brand boards could replace my 600w hps. I could be wrong tho.
Dimming doesn't necessarily make your lights more efficient, that only works when you're already running your light way above recommended specs, so the higher you go, the lower the output per energy consumed. Also driver efficiency tends to go down as you dim.I have a question I don't think I've seen people talk about before. I've read when you dim the boards the efficiency goes up, but does it affect the spectrum like dimming hid bulbs?
Almost. LM561 is rated for 200 mA max current, the LM301B is rated for 180 mA max current. Working voltage is about the same. Test current is also the same at 65 mA.Just to clarify the lm561c is also 0.3w not 0.5w like you posted above. The specs on the lm301b and lm561c are identical just the lm301b are more powerful. You actually need less of them versus more of them to equal a lm561c.
Thanks for the info.Dimming doesn't necessarily make your lights more efficient, that only works when you're already running your light way above recommended specs, so the higher you go, the lower the output per energy consumed. Also driver efficiency tends to go down as you dim.
Also, the spectrum should not change. On HID systems the spectrum changed because powering the light with less power than necessary led to a different chemical reaction than expected... So different reaction = different colors.
According to Samsung website and calculator the max drive current for lm301b is 200ma, the same as lm561c.Almost. LM561 is rated for 200 mA max current, the LM301B is rated for 180 mA max current. Working voltage is about the same. Test current is also the same at 65 mA.
Thiswhat's the highest wattage a board like this can be run at without a heatsink? anybody?