sentences:  Where colored light is needed, LEDs that inherently emit light of a single color require no energy-absorbing filters.LED lamps are commonly available as drop-in replacements for either bulbs or fixtures, replacing either an entire fixture (such as LED light panels replacing recessed fluorescent light fixtures or LED spotlight fixtures replacing similar halogen fixtures) or bulbs (such as LED tubes replacing fluorescent tubes or LED HID replacement bulbs replacing HID bulbs) The differences between replacing a fixture and replacing a bulb are that, when a fixture is replaced, it must be replaced in its entirety if the LEDs or the circuitry it contains fail, where as, if only the bulb is replaced, the bulb can be replaced independently of the fixture.White-light LED lamps have longer life expectancy and higher efficiency (more light for the same electricity) than most other lighting when used at the proper temperature.