YESUN's LED Bar is a 480mm side-view LED bar with 9pcs Samsung SMD3535 8°x12° beam optical lens for uniform illumination. constant-current DC12-24V, 27W and 100-110lm/W efficiency, with 3000K, 4000K, or 6500K options.DC5521 connectors and screw mounting simplify installation. Suitable for 10-30cm thickness, lighting distance within 1.5-4 meters, indoor single/double-sided light box