Philips 415802 Landscape and Indoor Flood 50-Watt MR16 12-Volt Light Bulb, 3-Pack Philips 50-Watt Landscape and flood light is ideal for use in outdoor landscape fixtures and indoor track lights Provides a bright, white halogen light For use in 12V fixtures only  not for use in enclosed fixtures GU5.3 Bi-pin base MR16 Shape