Lub zog ceev ntawm lub teeb los ntawm txhua lub cuab yeej kho mob LED lossis laser tuaj yeem sim nrog 'lub ntsuas hluav taws xob hnub ci' - cov khoom uas feem ntau rhiab rau lub teeb hauv 400nm - 1100nm ntau yam - muab kev nyeem ntawv hauv mW / cm² lossis W / m² (100W / m² = 10mW / cm²).
Nrog lub ntsuas fais fab hnub ci thiab tus kav, koj tuaj yeem ntsuas koj lub zog teeb pom kev los ntawm qhov deb.
Koj tuaj yeem sim txhua lub LED lossis laser kom paub qhov ceev ntawm lub zog ntawm ib qho chaw. Cov teeb pom kev zoo tag nrho xws li incandescents & cov teeb cua sov tsis tuaj yeem sim txoj kev no hmoov tsis zoo vim tias feem ntau ntawm cov zis tsis nyob rau hauv qhov ntau ntawm cov khoom siv rau kev kho lub teeb, yog li cov nyeem ntawv yuav raug inflated. Lasers thiab LEDs muab cov nyeem ntawv raug vim tias lawv tsuas yog tso zis wavelengths +/- 20 ntawm lawv cov wavelength tau hais. 'Hnub Ci' fais fab meters yog qhov tseeb rau kev ntsuas lub hnub ci, yog li tsis tau calibrated zoo meej rau kev ntsuas ib lub wavelength LED teeb - cov nyeem ntawv yuav yog tus lej ballpark tab sis raug txaus. Cov ntsuas teeb LED raug dua (thiab kim) muaj nyob.