GE Lighting 28917 75-Watt Postlight Saf-T-gard Blunt Tip E17 Designed with a unique all-weather construction, they withstand harsh weather conditions better than regular bulbs. Shatter Resistant Bulb - Protective coating helps contain glass fragments if broken. Lasts more than twice as long as regular decorative bulbs Application: Post lights for use in outdoor carriage and post light fixtures Lasts 3.7 years based on 3 hours per day usage