This is a set of 4 blue led livewell round button courtesy light. Below is the description of one (1) light: This led light illuminates your livewell and small utility area. Light is completely sealed and waterproof, energy efficient and bright. Blue led bulb draws little energy and emits very little heat. Light diameter 1 1/4", thread diameter 3/4" material: Pc led type: 5mm led color: Blue working voltage: 12v current drawn: 20 ma beam angle: 30 degrees color temperature: Led life time: 50000 hrs item: P00162bux4.