A LED filament light bulb is a LED lamp which is designed to resemble a conventional incandescent mild bulb with seen filaments for aesthetic and gentle distribution purposes, but with the high effectivity of gentle-emitting diodes (LEDs). The name comes from their strings of many shut-spaced collection-related diodes, which resemble the filaments of incandescent light bulbs a lot nearer than previous bulbs with many LEDs. They're made as direct replacements for standard incandescent bulbs, EcoLight as they are made in the same shapes, they use the identical bases that match the identical sockets, EcoLight energy they usually work at the identical supply voltage. They may be used for their look, comparable when lit to a clear incandescent bulb, or for EcoLight energy their vast angle of gentle distribution, usually 300°. They're additionally more efficient than many different LED lamps. Contemporary bulbs typically used a single massive LED or dimmable LED bulbs matrix of LEDs hooked up to at least one massive heatsink. As a consequence, these bulbs typically produced a beam only 180 levels broad.

By about 2015, LED filament bulbs had been introduced by several manufacturers. Two other unbiased patent applications have been filed in 2014 however had been never granted. The early filed patents included a heat drain under the LEDs. At the moment, luminous efficacy of LEDs was under a hundred lm/W. By the late 2010s, this had risen to close to 160 lm/W. The LED filament consists of multiple series-related LEDs on a transparent substrate, known as chip-on-glass (COG). These clear substrates are fabricated from glass or sapphire materials. This transparency allows the emitted light to disperse evenly and uniformly with none interference. Degradation of silicone binder and leakage of blue gentle are design points in LED filament lights. A benefit of the filament design is doubtlessly greater efficiency as a consequence of the use of more LED emitters with decrease driving currents. The lifespan of LED emitters is reduced by excessive working temperatures. LED filament bulbs have many smaller, lower-power LED chips than other sorts, EcoLight avoiding the necessity for a heatsink, but they must still pay attention to thermal administration