電燈
電燈（粵拼：Din6 Dang1，英文：Electric light）係燈一種，用電開着。電流過盞燈時會發光。家下係至常見嘅人工光，現代社會必需。室內嘅光，晚黑室外嘅光，都係靠佢。多數電燈，都係由發電廠輸電點着。但亦有啲係自己發電機或電池點着。有啲用電池，可以帶住周圍，叫閃燈或者電筒。
電燈有好多種，發光原理唔同。電燈膽，用電整到燈白熱發光。光管，整到管內氣體變離子，電子撞到螢光物發光。發光二極管，光電效應發光。電弧，兩極高壓差，電離空氣發光。重有其他好似激光咁。
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