Light Emitting Diodes (LEDs) use less energy, last longer, can turn on and off faster, and are much more durable. But that’s not all, LEDs also switch on and off faster than a regular incandescent bulb and can be made far smaller. But that doesn’t make them better in every situation: if you want to light up a room, an LED light would be more expensive and generate more heat than a fluorescent light of the same size.
While LEDs generally are not hazardous in themselves when used properly, they contain things like arsenic, gallium, lead, phosphorus, indium, zinc, aluminum, boron, and other things that must be mined (just as are the components of other bulbs).
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