Specifications: bulb overall height: 2 inches; Bulb diameter: 2 inches; Type: gu10 base, mr16 halogen, 25 w; Input voltage: ac 110-130 volt; Life span: around 1500 hours; Replacement bulb for np5 candles armer bulbGood materials: the halogen light bulb is made from clear glass, porcelain, and metal with a soft warm light, which offers you reliable light without dazzling your eyes; The general stuff enable it to fit most candle warmer lamps created after 2008Functions: the halogen bulb is great for candle warmers, fragrance burners, oil air refreshers, lamps, and some range hoods; the great versatility proves it to be a useful and practical productEasy installation: the candle bulbs have standard mr16 shape with universal gu10 twist and lock base; This gu10 c 120 v 25 w bulb can be easily screw in all standard gu10 without replacing the whole fixtureWide application: the light bulbs are often applied for accent lighting, recesses, hoods, track lighting, offices, art galleries, museums, restaurants, retail shops, etc.