This 20W halogen tubular light bulb from Osram offers exceptional clarity and colour rendering, making it the perfect light bulb for retail displays, galleries, and photography studios.It is also dimmable, giving you even more control over your lighting setup.At full brightness, the light bulb emits 235 lumens of warm white 2700K light, with an unbeatable CRI of 100, meaning it reproduces the colours of the surrounding environment perfectly. Its ES-E27 Edison screw (27mm) cap is compatible with all ES fixtures, so installing the light bulb is simply a case of swapping out the old light bulb for the new.