budlover123
Member
Edit: There's a grower on this forum doing something with 50-watt LEDs running at 350mA right now!!! Thanks Cinderella Man
https://www.icmag.com/ic/showthread.php?t=301894
this is a couple of threads from another forum I'd like to discuss, the conclusion of these tests seems to be you can get amazing light output with minimal heat using 50-watt LEDs. Has anyone tried anything like this or had similar results? I know a lot of people use those COB LEDs like the Apollo which essentially uses the same kind of LED, just a red and blue variety, and I've heard people complaining about heat and burnout issues. The way these are run in here, during the 150mA tests at least, barely generate heat at all! I'm sure the light output is a bit lower, but the difference between 350mA and 700mA was mostly heat, and even running at 150mA gets you very bright output.
http://lightput.com/forum/viewtopic.php?f=4&t=837
Re: HeatsinkUSA T-Slotted heatsink for high-powered LEDs
by Lightput » Fri Sep 06, 2013 3:12 pm
I got 6 50-watt LEDs, I was supposed to receive a sample of the DMX315 to test this out with, but I don't know what happened to that. These LEDs were rated to run at 1500mA at 25 volts per LED. I only tested them at 350mA and 700mA using 2 of those PXM-703 drivers I've been using, both getting power from the same 48 Volt adapter I've used for previous tests on here.
the 25V per LED these are rated at seemed about right, I could only power one of these per channel using my PXM-703 drivers powered with a 48V DC adapter, which indicates these LEDs need at least around 25V to get going.
I don't know what would have happened if I ran these at the 1500mA like they said these are rated to take, but they get extremely bright and hot at 350mA and 700mA. I do not have equipment to measure light output, but it seemed like the LEDs emitted almost as much light and a little more heat running 700mA than when they were running at 350mA. It seems like the most efficient way to run these would be at 350mA.
The camera was on the same settings for these 2 side by side photos, the sun was not coming directly in but it was a bright day out, also the MakersLED fixture on the ceiling had its 12 white CREE XM-L LEDs at full blast.
https://www.icmag.com/ic/showthread.php?t=301894
this is a couple of threads from another forum I'd like to discuss, the conclusion of these tests seems to be you can get amazing light output with minimal heat using 50-watt LEDs. Has anyone tried anything like this or had similar results? I know a lot of people use those COB LEDs like the Apollo which essentially uses the same kind of LED, just a red and blue variety, and I've heard people complaining about heat and burnout issues. The way these are run in here, during the 150mA tests at least, barely generate heat at all! I'm sure the light output is a bit lower, but the difference between 350mA and 700mA was mostly heat, and even running at 150mA gets you very bright output.
http://lightput.com/forum/viewtopic.php?f=4&t=837
Re: HeatsinkUSA T-Slotted heatsink for high-powered LEDs
by Lightput » Fri Sep 06, 2013 3:12 pm
I got 6 50-watt LEDs, I was supposed to receive a sample of the DMX315 to test this out with, but I don't know what happened to that. These LEDs were rated to run at 1500mA at 25 volts per LED. I only tested them at 350mA and 700mA using 2 of those PXM-703 drivers I've been using, both getting power from the same 48 Volt adapter I've used for previous tests on here.
the 25V per LED these are rated at seemed about right, I could only power one of these per channel using my PXM-703 drivers powered with a 48V DC adapter, which indicates these LEDs need at least around 25V to get going.
I don't know what would have happened if I ran these at the 1500mA like they said these are rated to take, but they get extremely bright and hot at 350mA and 700mA. I do not have equipment to measure light output, but it seemed like the LEDs emitted almost as much light and a little more heat running 700mA than when they were running at 350mA. It seems like the most efficient way to run these would be at 350mA.
The camera was on the same settings for these 2 side by side photos, the sun was not coming directly in but it was a bright day out, also the MakersLED fixture on the ceiling had its 12 white CREE XM-L LEDs at full blast.
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