Square Pin 55W/65W PC Compact (460nm Blue/10K White) Fluorescent Bulb

One tube is Actinic Royal Blue 460nm second tube is 10,000K Super Daylight. Combination of spectrums that provide color and growth of marine life. Great for saltwater and reef aquariums. Enhances the beauty and color in fish, coral and marine life. Great bulb to use in systems with only Compact Fluorescent bulbs for a more even light spread. 1.5 in. W x 21 in. L x 1 in. H. Hamilton Compact Fluorescent lights supply the most concentrated light intensity, color spectrum and wavelength essential for photosynthesis and coral health.