led sign lights -Slim 4mm,90Lm/w -Quality smd lightsource -Folding,flexible,lightweight, -Cost effective,sample avai led sign backlight lights Description:LED flexible led panel film shutter backlight (LED curtain, LED bamboo slips) ; new patented design, Top SMD LED, high light efficiency, low prices; Can be used for curved spaces. designed for light boxes designed for backlighting. Compared to ...