AI_toothbrush,

These seem good and mouser has ip58 ones which are perfect for me. Maybe ill use two of them for example. But im ordering a few because if they dont work im gonna abandon the fan idea. Still cool fans. As for heatsinks the whole flashlight is one. Its a really high power, small flashlight(hotrod). It uses two 14500 lithium cells(basically aa size) to power a boost converter with more than 70 watts. Even tho the boost converter is really efficient the leds produce so much heat that the light overheats in seconds. So thats why i want to test if fans help.

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