This Integral LED Golf Ball Light Bulb is a 4.2W, cool white (4000K) bulb with a Small Bayonet Cap (B15). It is frosted, non-dimmable, and offers 470 lumens, equivalent to a 40W incandescent bulb. The dimensions are approximately 78mm high by 45mm wide. It has an 'A+' energy efficiency rating and an estimated lifespan of 15,000 hours. LED bulbs provide instant full brightness and are more energy-efficient, saving money in the long run. This product includes a VAT invoice.