Led vaj huam sib luag lub teeb txuag hluav taws xob, siab ci, tsis muaj mercury, tsis muaj infrared, tsis muaj ultraviolet, tsis muaj electromagnetic cuam tshuam, tsis muaj thermal nyhuv, tsis muaj hluav taws xob, tsis muaj stroboscopic tshwm sim.Lub teeb yog lub teeb hauv qhov hnyav, kos thiab tshem tawm, yooj yim rau nruab.