Txawm li cas los xij, tsuas yog LEDs tiag tiag ua qhov lawv hais tias lawv tsim nyog nqis peev.Kev lag luam tus qauv rau LED teeb tsis ua haujlwm yog 3%.tab sis...
Nyob rau hauv 2018, lub ntiaj teb no LED downlight lag luam tus nqi mus txog 17.3 billion US dollars.Kev lag luam... 9.4.6 Adjustable LED Downlight (COB) 9.4.7 LED ...