The Mason LED comes with a 9.5-watt LED bulb, which can be replaced with any bulb of your choice, as long as it meets the socket specifications notated on the socket itself (150-watts for a standard bulb). A dimmable bulb should work, however, we're not tested them out. There is an on/off foot pedal and the shades comes in 2 parts; it does not come with a diffuser on the bottom shade.