The text on retail LED lamp packaging may show the light output in lumen, the power consumption in watts, the color temperature in Kelvin or a color description such as "warm white", "cool white" or "daylight", the operating temperature range, and sometimes the equivalent wattage of an incandescent lamp delivering the same output in lumen. LED lamps may use multiple LED packages for improved light dispersal, heat dissipation, and overall cost. Some LED lamps are drop-in replacements for incandescent or fluorescent lamps. Light output decreases gradually over the lifetime of the LED (see Efficiency droop section). Frequent switching on and off does not reduce life expectancy as with fluorescent lighting. LEDs come to full brightness immediately with no warm-up delay. The LED lamp market is projected to grow from US$75.8 billion in 2020 and increasing to US$160 billion in 2026. Generally the current waveform contains some amount of distortion, depending on the luminaires’ technology.
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The driver circuit may require special features to be compatible with lamp dimmers intended for use on incandescent lamps. LED lamps require an electronic LED driver circuit to operate from mains power lines, and losses from this circuit means that the efficiency of the lamp is lower than the efficiency of the LED chips it uses. Commercial LED lamps have a lifespan many times longer than incandescent lamps.
The most efficient commercially available LED lamps have efficiencies of 200 lumen per watt (Lm/W). LED lamps are significantly more energy-efficient than equivalent incandescent lampsĪnd can be significantly more efficient than most fluorescent lamps.
An 80W Chips on board (COB) LED module from an industrial light luminaire, thermally bonded to the heat sinkĪn LED lamp or LED light bulb is an electric light that produces light using light-emitting diodes (LEDs).
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