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Details of the LEDs.
These are pretty powerful! The heat sink gets warm too! Not enough to burn fortunately.
Keywords: Lit_Lighting

Details of the LEDs.

These are pretty powerful! The heat sink gets warm too! Not enough to burn fortunately.

HPIM0675.JPG 20120904_153624.jpg 100_1059.jpg HPIM2300.JPG 100_0922.jpg
File information
Filename:100_1059.jpg
Album name:Vince / Making art with lighting!
Keywords:Lit_Lighting
Filesize:129 KiB
Date added:Sep 17, 2011
Dimensions:2592 x 1944 pixels
Displayed:68 times
Color Space:sRGB
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DateTime Original:2011:09:17 18:50:32
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Exposure Time:1/800 sec
FNumber:f/4
Flash:No Flash
Focal length:5.85 mm
ISO:71
Light Source:Unknown: 0
Make:Eastman Kodak Company
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URL:http://www.galleryoflights.org/mb/gallery/displayimage.php?pid=8434
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Comment 1 to 8 of 8
Page: 1

streetlight98   [Sep 18, 2011 at 12:33 AM]
The heat sinks on my LEDs get pretty hot too. It's a lie that LEDs don't give off heat. True that they don't give off as much as CFL of incandescent, but they still do.
FGS   [Sep 18, 2011 at 02:11 AM]
Not really. What they meant by giving off heat is radiant heat. LEDs don't radiate much compared to incandescent or halogen. The heat you feels when touching the lamps themselves is from internal resistance in the electrical circuits. Same thing as the processor in your computer get hot when in use needing a huge heatsink/fan to cool it.
Silverliner14B   [Sep 18, 2011 at 02:26 AM]
Yes, LEDs produce what is called "conductive heat". They may product no IR rays, but they can get quite hot on the heat sinks, depending on the model. BTW these LOA retrofit lamps use CREE emitters if I recall correctly.
Form109   [Sep 18, 2011 at 02:52 AM]
FGS could you clarify that please?
GullWhiz   [Sep 18, 2011 at 02:54 AM]
The LED light itself, if you touch the LED itself, the plastic part, it's not hot at all!
joe_347V   [Sep 18, 2011 at 03:07 AM]
Yep ever feel the "beam" of heat in front of a incandescent or halogen lamp, that's the radiant heat he was talking about.
FGS   [Sep 18, 2011 at 03:12 AM]
If you compare the LED lamps with incandescent/halogen ones. Put your hand under the light beam of both. The LED one you won't feel the heat from it but will feel it on the other lamp. That's the kind of heat the companies say LEDs won't produce.

Lamps aren't meant to be touched much when they're in use anyway so they (companies) didn't bother mentioning the hot heatsink.
SeanB~1   [Sep 19, 2011 at 06:21 PM]
Built my own LED lamp today, using a 1W Stanley LED, and am using a old LGA775 heatsink ( without the fan) for a heatsink. Ran it for around an hour, and it is not even warm, the heatsink is around ambient with the die at just around 40C. Most of the LED lamps suffer from poor heatsinking of the die and the electronics.

Comment 1 to 8 of 8
Page: 1