SYLVANIA 56210 - 500 Watt - PAR56 - Narrow Spot - Halogen - 120 Volt - Mogul End Prong Base - 2950K 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 Osram PAR56 incendescent bulb, 500W, 120V, Narrow Spot NSP Base: GX16d Mogul End Prong, Rated Life (hrs): 4000, Luminous Flux: 8800