The Castello Style Retro Boutique 'Squirrel Cage' light bulbs are 60W. They display beautiful vintage filament with a very warm and elegant glow. Castello Style Edison bulbs are fully dimmable using standard rotary or electronic dimmer switches. With the use of a dimmer our filament bulbs can be used to create a simple yet unparalleled design feature. The filaments in the vintage light bulbs are all wound by hand. This gives each light bulb a uniquely rustic look.