Satco S4165 - 40 Watt Light Bulb - A15 - Frost - Ceiling Fan - Intermediate Base - 1,000 Life Hours - 430 Lumens - 130 Volt Incandescent bulbs are dimmable bulb and din not a have poor quality light as low energy bulbs best used in household and commercial lighting, decorative &amp; advertising lighting, portable lighting Stock now on Incandescent bulbs before 2012 phase out of incandescent light bulbs Satco A15 incendescent bulb, 40W, 130V, Base: E17 Intermediate Screw, Rated Life (hrs): 1000, Luminous Flux: 700