Raws li hom tshiab ntawm lub teeb pom kev zoo, LED (Light Emitting Diode) muaj qhov zoo ntawm kev siv hluav taws xob zoo, lub neej ntev, thiab cov xim ci, thiab yog ntau thiab nrov ntawm cov neeg. Txawm li cas los xij, vim yog cov yam ntxwv ntawm lub cev ntawm LED nws tus kheej thiab cov txheej txheem tsim khoom, qhov kev siv ntawm lub teeb ...
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