What temperature do your cob run ? I start building my light and and during the 1 hour test that we have done, the cob stay at mostly 100 degree Celsius or 212 Fahrenheit. Cob are citizen 1212 drived at 725 ma with 105mm passive heatsink from northerngrowlight.
Lighting cob temperature
- Thread starter le_mulot
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112 Fahrenheit not 212 right?
212 Fahrenheit . Pretty hot I know so we stop the test. But we dont know why. All the heatsink stayed at 110 degree. Its like they are not doing their job even if we have cleaned everything and put good thermal paste.
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The cob measured 212 and the heatsink measured 110?
I run Cree CXB 3590 3500K CD 36V's on passive heat sinks and they run at around 115F for me.
Ok how/where do you measure?
I have 1206s running at 50w and the heatsinks only get a few degrees over room temp but when I point my IR thermometer right at the cob I too get ~80°c. The heatsink does stay only lukewarm though.
I have 1206s running at 50w and the heatsinks only get a few degrees over room temp but when I point my IR thermometer right at the cob I too get ~80°c. The heatsink does stay only lukewarm though.
If I point the IR thermometer directly at the COB while it's on it'll read like 210F. There's not supposed to be IR in the spectrum as far as I know, but with the number of photons they're generating it's not too hard to imagine it could be throwing off the sensor. If I leave it measuring and capture right after the light is turned off, it almost immediately drops down to the same 110-120F that I read when I point it at the heat sink.
Scared me I thought that was at the heatsink. Which is spot on. The cob itself does get hot. It's definitely nothing I'd want to touch when it on
As someone said above, if you point it directly into the cob it will not read real temp, try measure from the side, or the same second light goes off.
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