This is a Philips MASTERLED 10w Dimmable Frosted GLS with a BC - Bayonet Cap and a 2700k (Extra Warm White) colour output. The 10w lamp is equivalent to the 60w traditional GLS lamp with an average lamp life of 25,000 hours. Has a lumen ouput of 806 lumens. This lamp is fully dimmable in any 240v type application with a dimming switch. The lamp is perfect for applications such as corridors, stairwells, foyers, and household use. The length of the GLS is 108.9mm and the diameter is 61.5mm. Philips part number: 929000248332