Design with a universal E26 screw base, this LED 3-way light bulb can be used in most standard lamp fixtures such as desk lamps and table lamps, floor lamps, pendant lights, harp lamps, etc. You can adjust between general lighting, concentrate on task lighting and relax mood lighting according to your needs. Note: The bulb can only be dimmed with the 3-Way sockets but can not work with common LED dimmers. If the bulb is paired with a regular LED dimmer, it will lose its dimmable function and will simply be a 10W bulb. Therefore, it is recommended that you use it paired with the 3-Way dimming lamp socket to realize dimming among 5W/10W/16W.