20 month bulb. Long life (Uses halogen technology for a brighter, crisper light. 25 in Beam. Lasts 25% longer than regular bulbs. (20 month life based on rated life at 4 hours per day.) Light output: 540 lumens. Life: 2500 hours. To save energy costs find the bulbs with the light output you need, then choose the one with the lowest watts. This bulb meets federal minimum efficiency standards. Enhance the beauty and security of your home with GE outdoor bulbs. Designed with a unique all-weather construction, they withstand harsh weather conditions better than regular bulbs. You'll find a GE outdoor bulb that's right for every outdoor lighting need. Replace regular light bulbs with GE outdoor bulbs. Ideal for accent lighting, merchandising displays and general illumination indoors in commercial settings. Provides nearly the same light output (540 lumens) vs 600 lumens) as 50 watt, 2000 hr. halogen bulb. SA listed. Made in Canada.