Included in the box are 12 individual incandescent bulbs. Each unique bulb is 10 watts and rated at 2700K for warm light. These bulbs are fully dimmable. Their unique silicone & flicker features make for a flame shaped bulb that will complement any fixture. Dimensions are 4.5 x 0.63 x 0.63 inches. This is called a flicker lamp, meaning it can imitate the flicker of a real flame without the hazard of open fires and the effects of burning candles within your home. Considered a safe and realistic alternative to traditional candles.