Bulbrite H39PAR20SP/ECO/2PK 39-watt Dimmable Eco Halogen PAR20, Medium Base, Spot, 2-Pack Included in the box is: 2 - 39 watt Eco Halogen PAR20 warm white bulbs Eco Halogen bulbs are the perfect replacement for an incandescent PAR reflector and can be used anywhere a standard reflector would normally be used Eco halogen bulbs are 25-Degree more efficient than standard incandescent equivalents 39 watts, 530 lumens, 100 CRI, 1,500 hour average rated life, Medium (E26) Base Dimensions: Maximum Overall Length 3.06 Inch; Bulb Diameter is 7.5 Inch