P 60 dropping poor heat transfer

JLumens

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May 3, 2008
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P 60 dropping poor heat transfer, looking at the P60 drop in it does not fit tightly into the flashlight body. Recommend a P 60 that screws into the body of the flashlight for better heat transfer Could have additional cooling fins on it. Hopefully made of copper could screw onto universal flashlights. Making cheap and affordable upgrades with just a new led and power supply.
 

vadimax

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People use to settle the issue with a copper foil wrapped around a drop-in. At least I do it :) 0.1 mm copper foil is vastly available on eBay.
 

Timothybil

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P 60 dropping poor heat transfer, looking at the P60 drop in it does not fit tightly into the flashlight body. Recommend a P 60 that screws into the body of the flashlight for better heat transfer Could have additional cooling fins on it. Hopefully made of copper could screw onto universal flashlights. Making cheap and affordable upgrades with just a new led and power supply.
First off, the P60 (D26) format does not do screw in. As the others have said, it is very easy to acquire some narrow copper foil to wrap around the drop in to increase the thermal conductivity. Almost any metal will work, but since one is unlikely to use gold or silver, copper is the best at thermal conduction. I'm pretty sure Mountain Electronics carries copper foil tape, and probably Illumination Systems as well.
 

fivemega

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Even if you use some copper foil between reflector and body, heat will transfer to body and not outside air. Please see air gap between outside thread and head/bezel. Foil will help some but not enough for long continues run or extreme hot LEDs. Keep in mind that after transfer heat to head/bezel, more tome needed to transfer to outside air.
Beefy head will do the job better but Cooly is the best solution for heat transfer, because there is no air gap outside the body for head (one piece body/head) also lots of air cooling fins.
 
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vicv

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The cooling fins will definitely help but as to the air gap the head threads onto the body. Those threads should conduct heat very well. As to the other comment about silver and gold. Silver is one of the best metallic conductors of heat. Gold not so much copper is much better. Gold is used as a coating on conductors and contacts because it does not oxidize.
 
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