Is there any difference in the light emitted from an LED and light emitted from a light bulb?
In: Physics
A regular light bulb makes light by making stuff red hot, this produces a lot of heat in the form of invisible infrared light, quite a bit of red and yellow light, and then a little bit less green light and then it follows the rainbow gradually falling off, creating white light but quite “warm”
Leds on the other end only produce blue light, so we use a phosphor that turn that glows and fills in the space between the red and blue in the rainbow, creating white light when it’s combined with the blue of the LED, creating a much “colder” light (there also are warm leds which just add more red so it balances out the blue more)
A regular light bulbs creates a better light, closer to that of the sun, because after all, they are both very hot things glowing from heat, but they also produce that invisible infrared light, which is wasted because we can’t see it, this is why leds use less power and create more light, and even then the difference the is pretty much unnoticeable to the human eye, and leds are getting way better, so it’s more than worth it to use LEDs
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