Rau cov khoom hloov, nyob rau hauv tib lub luminous flux, lub luminous efficiency yuav siv tau los kwv yees lub zog txuag piv. Piv txwv li, lub luminous efficiency ntawm ib tug 40-watt incandescent teeb yog hais txog 13 lumens / watt, thiab lub luminous flux yog 520 lumens; Lub luminous efficiency ntawm kev hloov 10 watt fluorescent teeb yog li ntawm 50 lumens / watt, thiab lub luminous flux yog li ntawm 500 lumens, uas yog 80 feem pua lub zog-txuag tshaj li incandescent teeb; Kev hloov pauv yog 5 A watt LED qhov muag teev muaj qhov ua tau zoo ntawm li 100 lumens ib watt thiab luminous flux txog li 500 lumens, uas yog 95 feem pua sib zog-npaum li cov roj teeb incandescent thiab 50 feem pua lub zog txuag dua li cov teeb fluorescent.
Yog tias nws suav tias lub sijhawm teeb pom kev zoo ib hnub yog 4 teev, ces 1460 teev teeb pom kev zoo ib xyoos yuav tsum. Raws li kev sib piv ntawm 5W LED teeb lub teeb thiab lub teeb fluorescent kuaj los ntawm kev tshaj tawm no, qhov ua tau zoo ntawm 5W LED teeb lub teeb yog sib npaug rau kev ua haujlwm ntawm 10W fluorescent teeb thiab 40W incandescent teeb. Nyob rau hauv ib lub xyoo, lub hwj chim noj ntawm incandescent teeb yog 58,400 watt-teev, fluorescent teeb yog 14,600 watt-teev, thiab LED qhov muag teev yog 7,300 watt-teev. Tom qab ntawd hloov mus rau degrees (1 degree=1 } kWh), incandescent teeb yuav tsum siv 58.4 kWh ib xyoos, fluorescent teeb 14.6 kWh, thiab LED teeb lub teeb 7.3 kWh.
