The wattage of a bulb is not a measure of the amount of light it gives, but rather the energy it uses. For instance, a 100 watt bulb gives 50% more light than four 25 watt bulbs. Fluorescent lighting is more economical than incandescent bulbs. Fluorescent lamps give five times the light and last up to 10 times as long as ordinary bulbs. Try not to install multiple lights (lamps or lighting fixtures) on a single switch. Turn lights off whenever possible to save electricity. Dimming switches allow you to regulate the light level and reduce electricity consumption to some extent.