... ,optical lens,and metal or other kinds of radiator shell with high heat conduction coefficient.It's ... secondary light lens,it's used condenser principle of flashlight,(parabola curve design) to decrease light loss ... delamination,heat-resistant. Structure 1,Base is made of heat-resisting and antiflaming creamy PC material . ... mall.3,Library,museum.4,Public places of entertainment,such as KTV,pub,club.5, ...