DiY LEDs - How to Power Them
- Thread starter SupraSPL
- Start date
Kevin the Great
Well-Known Member
They're in the 4000k or 5000k spectrums only. I cant tell what they are but if they're the CXB3590CD cobs then that'd be the a damn good deal. Doesn't say what the driver is either.
I'm not sure what CXB number they are but the low cost compared to building form parts,isn't a real surprise.
It is small for 3590 I agree wattage draw seems too low.I can't find anything on what CXB series is in them.No schematics,part list,etc...Now I'm curious if Cree uses 3590 in any of their light systems?
I might email Cree just to cure my curiousity.
It is small for 3590 I agree wattage draw seems too low.I can't find anything on what CXB series is in them.No schematics,part list,etc...Now I'm curious if Cree uses 3590 in any of their light systems?
I might email Cree just to cure my curiousity.
kony brado
Well-Known Member
it's not 3590 because the 240 watt fixture puts 24000 lumens (100 per watt),if they were 3590 driven at 20 watt each (240 w /12) they would put out 200 lumen per watt give or take(i think more)
i would spend that money on a3590 based fixture or diy
Kevin the Great
Well-Known Member
Does anyone have a link to cheap drivers?
Is there any disadvantages to using a cheap China driver? I realize maybe a couple of efficiency points resulting in a but more heat perhaps but if their rated output is accurate then the COBs shouldn't know the difference if they're on a cheapo or a meanwell. Right?
Is there any disadvantages to using a cheap China driver? I realize maybe a couple of efficiency points resulting in a but more heat perhaps but if their rated output is accurate then the COBs shouldn't know the difference if they're on a cheapo or a meanwell. Right?
giantsfan24
Well-Known Member
This is from a guy named Dion at icmag. I have no experience with these or any driver but to your point, here a link to cheap drivers...
http://www.aliexpress.com/item/Waterproof-LED-driver-60W-50W-1-5A-6-12X5-QiHan-constant-current-power-supply-lighting-transformer/32265565611.html
alesh
Well-Known Member
Inefficiency, unreliability. Output isn't as accurate and stable. How cheap would they have to be?
Kevin the Great
Well-Known Member
I found some 300 ma 50-120 dcv drivers for 9 bucks.
I was thinking about 4 vero 18s each for sidelighting.
http://m.aliexpress.com/item/32578807952.html?productId=32578807952&productSubject=CE-Certified-Isolated-300mA-18-36x1W-Led-Driver-18W-20W-24w-26W-30W-36w-Power-Supply&tracelog=wwwdetail2mobilesitedetail
alesh
Well-Known Member
It's up to you. Larger MW drivers are the same price per watt.
robincnn
Well-Known Member
Lpc-100-2100 . cheep. one per cob but less efficient and 2 yr Warranty.
Clg 150-36 TYPE A will work, 3 yr warranty
Hlg150 -36 TYPE A 7 year warranty
With cobs in parallel it is this issue tht if one cob fails the other gets all the current.
You can avoid this issue by using Supra's idea.
Just connect single cob to driver and adjust the Vf potetiometer on driver so that current is around 2.1 amps or little higher. Then keep it like that and connect 2nd cob. Verify current is 2.1+2.1. Use the other current control internal potentiometer to adjust current to control intensity.
Now if one cob fails the other cob will not get full 4.2 amps. It will get around 2.1 amps due to the voltage limit you set using voltage potentiometer on driver.
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giantsfan24
Well-Known Member
Do LED drivers get hot? Most are measured at 85c I've also seen 50c. Is that realistic?
thetr33man
Well-Known Member
Most ive touched stay cool to moderately warm, if they are uncomfortably warm to touch, you might wanna do some testing with a multimeter cuz you might have them hooked up wrong, or they could be failing/damaged.
robincnn
Well-Known Member
Some of the tests are done at 55C to 60C , 95% RH so driver may reach 75-85C. I assume this happens on a hot summer day with the driver mounted on a high bay light.
For indoor use i have seen around 38C with Ambient 20C. Depends on plastic/metal case type, efficiency, load
Never saw a driver that was too hot. Just warm to touch.
For indoor use i have seen around 38C with Ambient 20C. Depends on plastic/metal case type, efficiency, load
Never saw a driver that was too hot. Just warm to touch.
giantsfan24
Well-Known Member
Are you using mean well drivers?
giantsfan24
Well-Known Member
Has anyone used the drivers from cutter? Pairui I think they're called?
tripletrey34
Member
Sorry for random question but searched three days still no real answere so. If you have 2 led drivers both say 70-85 dc const current 520 ma can you combine the two and. Get. 70-85 vdc 1040 ma to possibly run cree cxb3590 72v 1.2a
long story hydrogrow sol6 600watt pops stock 100watt cobs like pimples just found out about cree cob thru add and hell why not
long story hydrogrow sol6 600watt pops stock 100watt cobs like pimples just found out about cree cob thru add and hell why not
Attachments
robincnn
Well-Known Member
Most likely no. I would not try. If Meanwell drivers does not support parallel function. I would not expect a random driver in Chinese grow lamp to support parallel function either.
https://www.rollitup.org/t/matching-drivers-and-cobs.883866/page-17#post-12160995
also interesting
http://www.meanwellusa.com/faq.html
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tripletrey34
Member
Super random super junk. Dam you hydrogrow. I think there getting it though theyve sent me ten cobs free within the first month I had the light im about to install the last one I have 9/10months later. 50,000 hours my ass. they werent tryin to warrentyshit til I told them about the advanced leds iv had for 6 years know with no probs. Warranty page know says yeah file but we dont have any to give you. 12 total drivers in light each driver powers half a 100watt cob. Thanks for your help. Funny just saw you in other thread and your image had me looking up veros and kingbrite. Helping newbs and dont even know it.
giantsfan24
Well-Known Member
I've looked and can't find a thread so far...
Is there a thread that shows how to wire the driver and the fan power supply to the same dimmer and power switch? Is that possible?
Also, has anyone used the Pairui drivers from cutter?
Thanks!
Is there a thread that shows how to wire the driver and the fan power supply to the same dimmer and power switch? Is that possible?
Also, has anyone used the Pairui drivers from cutter?
Thanks!