04-29-2010, 12:32 PM
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look into Cold cathodes and LED's. These are very thin low profile and can be siliconed into your existing hood. I make my own and it costs $10-15 depending on tank size, and if you want them dimmable. Cold cathodes are best for larger tanks cuz wiring LED's can be a lot more difficult compared to the simplicities of cold cathodes. Here
is a good page for making them, to make dimmable ones you just need to run them off a universal 12 v AC/DC converter. These have a switch for 12,9, 7.5, 5,and 3volts which is what allows the dimming.
A cold cathode running at 12volts on a 55gal.
these are LEDs, they are a darker blue and the camera doesn't pic them up as well.