Long life, 10,000 hours average rated life - SpringLamps. 8000 hour average rated life - globes/a-lamp/floodlights. Lasts 9 years, based on 3 hours use per day - SpringLamps. Lasts 7 years, based on 3 hours use per day - globes/a-lamp/floodlights. Replace less often, ideal for hard to reach places. Lower maintenance costs for lamp replacements. Saves up to 75% in energy costs for compared to similar light output incandescent lamps. Quick run-up time. Medium base and compact height fits anywhere a standard incandescent fits. Instant start, flicker free. End of life logic guards against violent failures. World class phosphor insures high lumen output and excellent lumen maintenance. Up to 23 Watts approved for enclosed fixtures. Special Application Notes: Up to 23 watt is UL approved for totally enclosed fixtures. Use a 27 watt in an open recessed can.