ZWL-I5 model can test photometric colorimetric and electric parameters for checking the quality of LED chips. Electric test: forward voltage andreverse current.Photometric test: luminance LOPaccording to the different component can measure cd/mcd/W/mW/lm/λp,λd,λc,hw,purity,(x,y),CCT,CRI;Four-wiretype test and touch resistance function avoid wrong judgement.International authoritative standard: ...