How to Make a Moon Light for a Fish Tank

Making a moon light for an aquarium is relatively easy to do. The supplies are readily found on auction websites and computer supply companies on the Internet. Putting the moonlight together only requires a cold cathode light kit, an adapter and a means to secure the lamp to the aquarium lid. It is much less expensive to make a moonlight than it is to purchase one, and fish seem to enjoy the effect as well as people do.

Things You'll Need

  • 1 or 2 5- to 12-volt-AC-to-4-pin DC adapters with 3-pin power cords
  • 1 to 5 12-inch UV cold cathode light kits
  • Blue spray paint
  • Duct tape
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Instructions

    • 1

      Purchase one or two power supplies for an external hard drive with a four-pin connector at the end of it, or use an available one. Five- to 12-volt-AC-to-4-pin-DC adapters with 3-pin power cords are recommended.

    • 2

      Purchase the desired number of 12-inch UV cold cathode light kits depending on the size of the aquarium.

    • 3

      Spray paint the cathodes blue and let dry. More paint can be applied later to get the desired brightness.

    • 4

      Mount the cathodes to the underside of the aquarium lid with duct tape.

    • 5

      Plug the cathode switch into the cathode tubes and the 4-pin adapter. Plug the adapter into the power source.