... low temperature,long lifespan and colorful. 3,Regarding secondary light lens,it's used condenser principle of flashlight,(parabola curve ... light loss.4,Soft light,without black spot and yellow ring.5,Plating treatment,with high reflective efficiency,no delamination,heat-resistant. Structure ... or as advertising lighting. 1,Starred hotel,express hotel,chain hotel and so on.2,Shopping spots,such as market ...