Halogen 120-Watt Replacement PAR38 Indoor and Outdoor Floodlight bulbs cast a wide beam of warm white halogen light. They are dimmable to provide just the right brightness and work in motion-sensor and security lights. Halogen PAR38 (4-3 with 4-inch diameter) Indoor and Outdoor Floodlight bulbs are rated to last 1 year based on 3 hours per day use. Designed with all-weather construction, they withstand harsh weather conditions better than standard bulbs. Use these halogen PAR38 floodlight bulbs with medium bases in outdoor security lighting and indoor recessed fixtures to cast wide beams of light.