With three rows of 7 K LED daylight bulbs, this Fluval Ultra Bright LED Aquarium light produces the same light intensity as a twin tube strip light but uses less energy. The light is excellent for fish-only marine tanks or freshwater, low-light planted tanks (such as crypts, anubis, and java fern). The 7K LED band provides better colour rendering and a natural shimmering effect. This LED fixture has a very low profile design only 3/4" in height and 5" wide. Both ends of the light have extendable ABS leg supports that expand to fit wider tanks. The legs also give off a blue glo when the moon lights are on during the night hours. The legs can also be completely removed so the fixture can be placed directly on a glass canopy for an even lower profile. The light has a single power cord and a single switch that allows either all LEDs ON, only the blue LEDs ON (for simulated moonlight), or OFF. The LEDs are designed to last 20,000 hours, providing over 5 years of lighting under normal operation.