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Results 1 to 7 of 7
  1. Default Any idea how to waterproof light bulbs?

    0 Not allowed!
    Hi guys. I need some advice. I just got me a pair of mr11 led bulbs to replace the halogen mr11 bulbs on my Fluval Edge tank. I got one problem though, the led bulbs that I got are not waterproof. Any suggestions on how to waterproof it? A friend suggested using saran wrap but wouldn't that melt due to the heat?

    Attached is a pic of the led bulbs. Thnx.
    Attached Images Attached Images

    36 Gallon Bow Front Freshwater Aquarium
    6 Tiger Barbs
    4 Clown Loaches
    5 Chinese Algae Eaters

    16 Gallon Bow Front Freshwater Aquarium
    1 Pearl Gourami
    1 Male Betta - Delta Tail
    5 Zebra Danios
    2 Emerald Green Cory Cats

    6 Gallon Fluval Edge
    1 Male Betta
    9 Neon Tetras
    3 Albino Cory Cats

  2. #2


    0 Not allowed!
    I would not use saran wrap directly on the light. Any head at all from the light or the metal and you'll have melted plastic everywhere.

    What do the bulbs look like in their fixture? You might be able to get a small piece of plexi glass (or regular glass) to put between them and the tank. If you have the room you could also try building a box for around the fixture, then use saran wrap, or heavy duty sheet protectors (cut to size) on the bottom if it's not touching the bulbs.
    75G Planted Community Tank:
    Neon Tetras, Glowlight Tetras, Platties, Guppies, and Corries,
    with 4 hang off breeder tanks for Blue/Red Platty Project

  3. #3


    0 Not allowed!
    Are you concerned about splashing or condensation? a small thin sheet of plexi would be a good long term solution. I don't think those LED's put out much heat by design, so I imagine plastic wrap kept 1" away would be fine.

    silicone might work as well, IIRC it is non conductive, though it will block some of the light and trap heat.

    Is there nothing between the bulb and the water?
    Who is "General Failure" and why is he reading my hard drive?

  4. #4

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    0 Not allowed!
    You could coat it all except the lenses with silicone. Unless it's in a sealed off area there'll be condensation. Silicone will cause it to run warmer though as it's not going to let the heat out as in the open design. I'd use silicone if it was me so that's what I'm suggesting.


    1G Planted Betta tank, 1.5G Planted Betta tank, 10G Planted Swordtail Fry tank,
    10G Neolamprologus Multifasciatus (Shell Dweller) tank. Empty/Work in Progress 135G, 40GB, 2 x 20GL, 2 x 10G
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  5. Default

    0 Not allowed!
    I had a Fluval Edge and the lights get too hot for plexi - you really should cut a rectangle of glass if you are going to use a barrier. The problem you will have with this is securing the piece in place. You don't have any surface you can lay the piece on so you have to contrive some kind of bracket arrangement around the bulbs. If I were going to do it, I would use silicone to fix a rigid post in the center of the glass, and then use silicon to glue the post between the light fixtures. The problem then would be cleaning the glass when algae builds up on the water side and changing the bulbs. To do either you will need to remove the post from the light fixture and you would have to re-glue (or re-silicone) to put it back together. I'm not much of a DIYer though, so someone else probably has a better but more complicated solution.
    Why do people always scream when I'm driving?

  6. #6


    0 Not allowed!
    LED's put out a lot less heat than halogens. Part of the efficiency is less energy loss to heat. Still not 100% how much cooler they are, but most LED's are usually cool enough to touch, whereas halogen is ungodly hot. IIRC its almost 1000 degrees C on the inside.
    Last edited by Scrup; 11-13-2010 at 07:11 PM.
    Who is "General Failure" and why is he reading my hard drive?

  7. Default

    0 Not allowed!
    I use the same LEDs on my Edge tank and have no issues with condensation or water splashes. I dont use the stock filter which I think is the cause of most of peoples lights getting wet. I have heard of people coating the bulbs with clear heat resistant engine block spray paint that is available at local hardware stores with success but they dont have any idea if that changes the light frequencies being output by the LEDs.
    31 Gallon Hagen Waterhome with 2 x 20W T8 6700K Life Glo tubes, Fluval 205 canister filter, Aquaclear 200W and Marineland Stealth 150W heaters, Hydor Hydrokable 50W substrate heating cable with Hydrostat thermostat, Hydor Ario 2 Blue aeration night light. Compressed CO2. Very Heavily Planted.

    58 Gallon Hagen Light-Glo/Waterhome with 2x40W T8, 2x Fluval 404/405 canisters filters, Ebo-Jager 250W Heater, Marineland Stealth Pro 300W heater. Compressed CO2. Moderately planted.

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