Xim kub yog ib qho tseem ceeb hauv kev ua kis las teeb pom kev zoo. Feem ntau, 4000-5500K yuav tsum muaj rau tus qauv ntawm cov kis las. 5600K CCT yog qhov yuav tsum tau muaj ntawm NFL, vim nws raug kaw rau lub hnub kub ntawm 5778K.
Thaum nruab hnub, lub teeb xim ntawm lub hnub yuav hloov nrog lub sijhawm. Lub teeb xim yuav daj thaum lub hnub nce 40 feeb, xim kub yog nyob ib ncig ntawm 3000K; lub teeb xim yog dawb thaum lub hnub thaum tav su, CCT nce mus rau 4800-5800K, thiab nws nyob ib ncig ntawm 6500K thaum tav su yog tias nws yog hnub huab; lub teeb xim yog reddish thaum lub hnub yuav teeb, xim kub txo mus rau 2200K, thiab nws yuav zoo ib yam li cov xim kub ntawm tswm ciab. Rau cov chaw ua si sab nraum zoov, 4000K lossis siab dua yog feem ntau xav tau, tshwj xeeb tshaj yog thaum tsaus ntuj kom haum rau nruab hnub. Rau cov chaw ua si sab hauv tsev, nws feem ntau xav tau 4500K lossis qis dua.
