The ESU 20000K Marine Fluorescent Lamp is a high-intensity purified super-daylight fluorescent bulb that is perfect for deep marine aquariums. Providing high-quality blue-white coloration that is great for reaching deep into any aquarium, this bulb is great for providing the necessary full-spectrum day lighting for corals and other invertebrates. High-quality construction, long-lasting bulb.
Size: 18.75"x1"x1" (T8)