Tri-Cree in a petzl zoom

[zgurl]

Hi there,

I re-discovered this week end my (very) old Petzl Zoom. It seems a nice host for modding since it is so easy to open and has a wide area inside availlable for heatsinking, 3 LEDs and optics/reflector. The battery box is also perfect for 4x18650...

But my question is about heating... If I put 3 Crees driven at 350-500 mA, it will certainly create some heat that will be har dto dissipate out of the head since it is hermetic (for waterproofness) and made of plastic. I am affraid the plastic could be damaged by the heat, but also that the LED cannot properly function becasue of high temperature.

Any idea about this?

Anyway if using a tri-Cree inside is non-sens because of too much heating, I will be able to get the battery holder to be modified into a perfect 4x18650 case

 

[Alin10123]

hmm... 3 crees driven at 350mA doesn't sound like it would create a whole lot of heat though. @ 500mA possibly. but i still doubt it would create enough to hinder a lot of performance.

 

[Long John]

zgurl, with a propper heatsink it will work. Take a look here:

https://www.candlepowerforums.com/threads/146187

Good luck and best regards

_____
Tom

 

[zgurl]

zgurl, with a propper heatsink it will work. Take a look here:

https://www.candlepowerforums.com/threads/146187

Good luck and best regards

_____
Tom

Tanks for the link. It really looks like what I have in mind

I will keep you posted of this build.

 

[Long John]

You are welcome

It would be nice keeping us updated.:rock:

Best regards

_____
Tom

 

[mikeh]

zgurl, with a propper heatsink it will work. Take a look here:

https://www.candlepowerforums.com/threads/146187
_____
Tom

That looks great, but how does the heat get out? 10W could get very hot without plenty of metal-air surface area. A big chunk of metal inside only works for so long. Can anyone explain?

 

[zgurl]

That looks great, but how does the heat get out? 10W could get very hot without plenty of metal-air surface area. A big chunk of metal inside only works for so long. Can anyone explain?

That is exactly what I was affraid of...