Sure can. Go to autolumination.com and pick up some of the blule led's they sell. Then go to radio shack or walmart and pick up a power supply or by one from autolumination. cheaper thart ebay and a lot of folks on reef central have gone this route.
This link should take you to the led's they sell. You will need to scrool down some to see the led's
http://autolumination.com/fixtures.htm
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Salinity 1.025, Temp 78 +/- .5, PH 8.2, Alkalinity 9.5 on KH scale, Ammonia 0, Nitrite 0, Nitrate 2, Phosphate .03 Calcium 350, Magnesium 1400
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