Please use the links above for replacement Power Compact Nano Cube bulbs. Usually saltwater folk go for the 10 k and the 71k blue JBJ combo bulbs. These are what is usually standard with the 6, 12r, 12 dx and 24 dx units from the factory.
If you are looking for freshwater bulbs though for a planted aquarium you are better off with the 6500k ones. You however can get away with 10k as these are a whiter white than the 65-6700k bulbs.
Please use this link for all of our Nano Cube Bulbs