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True Lumen 460nm T5HO Actinic Blue bulbs by Current USA are suggested to replace the recently discontinued SlimPaq Actinic Fluorescent Lamps. True Lumen Actinic bulbs will work in all T5 light fixtures, just ensure you use a bulb with the same wattage as was originally in your light fixture.
The deep blue spectrum these lamps emit will give aquariums the “deepwater” blue look and enhancing the stunning colors in marine corals and fish. The 460nm actinic blue wavelength is a great lamp for actinic blue supplementation and encouraging fluorescence in both hard and soft corals.