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As of 2011, incandescent lighting was the most common type used in homes, delivering about 85% of household illumination. [2] To produce light, incandescent light bulbs convert electricity to heat, heating a filament to the point where it glows; a portion of the heat is thus converted to light.
60 W incandescent light bulb with energy efficiency class E Equivalent 42 W halogen incandescent light bulb with efficiency class C Compact fluorescent lamp LED lamp circa 2021. Various governments have passed legislation to phase out manufacturing or importation of incandescent light bulbs for general lighting in favor of more energy-efficient ...
Fluorescent bulbs contain mercury, a toxic substance. The United States Environmental Protection Agency (EPA) provides safety guidelines for how to clean up a broken fluorescent bulb. [17] Mercury can be harmful to children and developing fetuses, so children and pregnant women should avoid being in the area whilst a broken bulb is cleaned up. [18]
It may come as a surprise, but all of these things are legal in the U.S., at least in some parts. The post 18 Things You Think Are Illegal but Aren’t appeared first on Reader's Digest.
A fluorescent lamp, or fluorescent tube, is a low-pressure mercury-vapor gas-discharge lamp that uses fluorescence to produce visible light. An electric current in the gas excites mercury vapor, to produce ultraviolet and make a phosphor coating in the lamp glow.
Limited amounts of mercury in fluorescent and other light bulbs where it is essential to their functioning comprise RoHS 2 Categories 1, 2, 3, and 4; Medical devices were exempt in the original directive. [24] RoHS 2 narrowed the exemption's scope to active implantable medical devices only (Category 4h). In vitro diagnostic devices (IVDD) and ...