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Thread: Water Cooled LED Flashlight :)

  1. #1

    Default Water Cooled LED Flashlight :)

    Hi all,

    This is something I've been wanting to experiment with for a while now. I feel like this proves yet again that thermal path is king...



    Please let me know what you think of the project.
    In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
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  2. #2
    *Flashaholic* StarHalo's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    Love the idea, but man is that some ugly implementation; starting with a computer water-cooling kit might make more sense, and look a lot better..

  3. #3

    Default Re: Water Cooled LED Flashlight :)

    Reminds of of the water tap lights..... water powered.
    Fenix Split rings 1400+ sent, SWIVELS now available also!
    Psalm 112:4 Light shines in the darkness for the godly. They are generous, compassionate, and righteous.

  4. #4
    peter yetman's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    That was fun!
    It's the sort of thing I mess about with, you can come and play at mine anytime.
    P

  5. #5
    KITROBASKIN's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    Subscribed!

    Maybe someone will build a forced air cooling, compact 2X 18650 XHP70 with maybe 3 inch reflector. I have a ~1.5" biscuit fan blowing on cooling fins attached to the motor on a radio control car (fan purchased from thetoyz.com some time back)...

  6. #6

    Default Re: Water Cooled LED Flashlight :)

    Just need to make a light that is designed to work in a jar of water.... a water lantern.
    Fenix Split rings 1400+ sent, SWIVELS now available also!
    Psalm 112:4 Light shines in the darkness for the godly. They are generous, compassionate, and righteous.

  7. #7
    *Flashaholic* StarHalo's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    Do this but with a light source:


  8. #8
    Flashaholic* rayman's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    +1 for the idea with the computer water-cooling solution.

    There are already multiple water-cooling systems for different fan sizes and quantities. I like your idea but I think for a longer possible runtime you need to use active cooling for the used coolant. The ice will melt and the water will get hot and then the cooling capability will degress. If you use an active cooling solution you will only be restricted by the amount of batteries you can carry ;-). But in your setup the active cooling system should be easiely integrated.
    My Lights (current EDC: Foursevens Mini MkII Titanium)

  9. #9

    Default Re: Water Cooled LED Flashlight :)

    Quote Originally Posted by KITROBASKIN View Post
    Subscribed!

    Maybe someone will build a forced air cooling, compact 2X 18650 XHP70 with maybe 3 inch reflector. I have a ~1.5" biscuit fan blowing on cooling fins attached to the motor on a radio control car (fan purchased from thetoyz.com some time back)...
    Sounds ambitious.

    Quote Originally Posted by StarHalo View Post
    Do this but with a light source:

    Quote Originally Posted by rayman View Post
    +1 for the idea with the computer water-cooling solution.

    There are already multiple water-cooling systems for different fan sizes and quantities. I like your idea but I think for a longer possible runtime you need to use active cooling for the used coolant. The ice will melt and the water will get hot and then the cooling capability will degress. If you use an active cooling solution you will only be restricted by the amount of batteries you can carry ;-). But in your setup the active cooling system should be easiely integrated.

    I'll be shopping around....
    In Him (Jesus Christ) was life; and the life was the light of men. And the light shineth in darkness; and the darkness comprehended it not.
    FS: Everyday Carry Lights Upgrades for Maglite.

  10. #10
    Flashaholic* Overclocker's Avatar
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    Default Re: Water Cooled LED Flashlight :)

    you'll want a jet of water directed at the backside of the MCPCB

    you could even try cutting micro-grooves on the copper MCPCB to increase the surface area

  11. #11
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    Default Re: Water Cooled LED Flashlight :)

    Quote Originally Posted by Overclocker View Post
    you'll want a jet of water directed at the backside of the MCPCB

    you could even try cutting micro-grooves on the copper MCPCB to increase the surface area

    Picking a holster to EDC this will be really fun.
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