Ushio EBV 500 Watt Photo Flood Lamp 120 volts 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 Ushio PS25 incendescent bulb, 500W, 115V, Base: E26 Medium Screw, Rated Life (hrs): 6, Luminous Flux: 17000