Nto-mounted teeb uas illuminates Sab hauv nrog tusyees faib lub teeb ntuj.Ib qho yooj yim, ilv daim ntawv ua rau lub teeb tsis yog ib qho tseem ceeb nyob rau hauv sab hauv.Qhov muaj ntawm ntau hom aperture tso cai rau kev kho ntawm lub teeb rau cov neeg siv cov kev xav tau ntawm tus kheej.