Kev ua haujlwm ntawm LEDs sab nraud ntawm cov xwm txheej tuaj yeem ua rau thermal degradation ntawm cov khoom siv hauv cov pob LED, xws li phosphor, capsules, thiab yas lo ntsiab muag. Qhov no ua rau muaj kev hloov pauv mus tas li chromaticity thiab spectral hloov pauv.
Kev hloov pauv ntawm thermal expansion coefficient vim qhov kub thiab txias yuav ua rau epoxy capsule ntawm LED pob kom nthuav dav. Qhov no yuav ua rau ntxov ntxov hnav thiab tawg ntawm cov hlua khi hauv cov pob LED thiab yuav ua rau lub LED tawg tag.
