Where colour options or different effects are desired light-emitting diode(LED)lighting is now a good choice. LED bulbs can provide bright lighting as well as increasingly better colour rendition with less energy use. Typical uses include cove lighting in corridors, display lighting and increasingly different alternatives as the technology continues to expand rapidly. LEDs last from 100,000 hours to 1,000,000 hours compared to a 30,000 maximum life span of fluorescent bulbs, plus they do not contain the harmful mercury found in fluorescent bulbs.