Be sure to choose the appropriate link bulb for your fish tank. These will work in the Nanocube's 12 gallon only as well as many other freshwater and saltwater tanks.
These Power compact bulbs fit the 12 gallon regular and the 12 gallon deluxe models of the Jbj nanocube as well as other 24 watt straight pin lighting fixtures.
If using in the saltwater environment we do suggest marking the bulb with the date you installed for visual reminder to replace it in six months to provide optimal light output in your aquarium.