454nm T5 Fluorescent Aquarium Lamps by UV Lighting Co. The Ultra Blue 454 lamp is made of 85% 454nm and 15% 420nm spectrums. The look is undeniably blue which adds depth to any aquarium large or small; makes more vibrant colors appear. Great supplement lamp to any aquarium. UV Lighting has established itself as the hobby favorite with their popular VHO lamps and now they're continuing this with their T5 line. T5 lamps are unmatched in their output and intensity due their reflective possibilities. Their small diameter (compared to other fluorescent lamps) allows manufactures to create parabolic reflectors that are extremely efficient. These lamps are the future of fluorescent technology. Whether you use them as supplementation with metal halide or stand alone they are sure to impress. *Important Shipping Information: Minimum order of 2 (two) T5 lamps, (Mix & Match), to qualify for our standard shipping fees.