An energy efficient non-dimmable 4W LED golfball bulb that comes supplied with a B15 small bayonet cap. The lamp acts as an ideal retrofit bulb for traditional 40w incandescent bulbs and will provide 470 lumens of very warm white (2700K) coloured light. This filament LED has an extended lifespan of 25000 hours of usage and is designed to replicate the look of an old tungsten filament lamp. Lamp dimensions Diameter 45mm x Length 78mm