The LED exit sign retrofit kits use only about 4.5 Watts of power, about 12 times less than an incandescent exit sign and 5 times less than a fluorescent exit sign. Our kits are not only energy efficient, but also very bright - an amazing 77 lumen per watt. The ZXE5000 is designed to outlast incandescent and fluorescent lamps in exit signs. This means low maintenance costs, since electricians do not need to replace lamps that keep burning out.