Hom thiab cov yam ntxwv ntawm cov pa roj paug siab
1 Cov duab spectrum yog xim. Los ntawm xaiv ib qho khoom tsim nyog luminescent, lub spectrum radiation tau concentrated ntawm qhov xav tau wavelength, los yog ob peb luminescent khoom siv tau tib lub sij hawm kom tau qhov zoo tshaj plaws spectrum.
2 nrog rau kev ua haujlwm, lawv tuaj yeem hloov 25-30% ntawm cov hluavtaws xob nkag mus rau hauv lub teeb tso zis.
3 lub neej ntev. Siv kom ntev.
4 Lub teeb zis muaj qhov zoo thiab muaj peev xwm muab 60-80% ntawm cov khoom tso zis thaum xaus ntawm lub neej.
Tam sim no, muaj cov khoom ntsig taub ntsig siab siab, (fluorescent) siab muaj mercury cov teeb meem, xenon teeb, cov teeb phom tooj hlau thiab cov zoo li.