50 Watt Underwater Lighting System for Above Ground Pools - 12 volt, 50 watt outdoor pool transformer. Easy installation - no drilling or draining of pool. 50 watt long-life UV coated halogen bulb. On-Off switch, Built-in 3 hour timer with auto shut-off. One light sufficient to light any aboveground pools. Will not interfere with water return. 28' cord.