Simulate the midday tropical sun with Coralife"s 10 000k Compact fluorescent lamp! Your fish coral and plants will thrive and look stunningly beautiful in the sparkling blue-white rays cast from this bulb. High intensity output rugged construction and energy efficient. Complement your aquarium and your fish with the highest quality rare earth phosphors found in this Coralife Compact fluorescent lamp. 96 watts 10 000k (kelvin). 4"" L square pin arrangement.