Interpet - Replacement LED Blue Moon Bulb - 7w ESLLED 7w ESL Replacement Lighting Blue Moon See your aquarium in a new light with this replacement screw fit LED bulb. More than double the life at less than half the cost of traditional 15W ESL lamps. The best bits Universal E27 screw fitting for use in any aquarium using E27 lamps Especially designed for the Fishpod and Fishbox aquariums Replacement for the 15w ESL lamp Key features Low wattage 0. 2w LEDs Easy to install for a quick and easy change to