3W High Luminosity Power LED Stars – TruOpto OSB5XME3C1S, These power star LEDs are high luminosity modules that are mounted on an PCB substrate. Being more energy efficient than incandescent and most halogen lamps and available in a range of colours, including white and warm white, these LEDs are ideal for a wide range of applications including: electronic signs and signals, small area illumination, back lighting and other lighting, bollards, security and garden uses, traffic signalling and beacons. TruOpto OSB5XME3C1S 3W 3.3V Blue Power LED Star 30lm