By replacing standard incandescent lights with energy saving fluorescents or light-emitting diodes (LEDs), the total lighting load can be reduced by between 50 - 90% without sacrificing illumination. An incandescent bulb can be replaced with a fluorescent using one quarter of the power and they last 4-5 times longer than bulbs.

In addition, LEDs consume one tenth the power of an incandescent, and offer 50,000 hour operating life. Their brightness is a function of the number of LEDs. Because of their low power draw they are ideal for some solar power systems