Add a bit of nostalgia to your home, office or personal space with an Edison style vintage light bulb. The ST21 shaped 40-watt wonder casts a spell over your space with a charismatic warm antique glow. The clear Edison bulb with squirrel cage filaments is the ultimate in mood lighting for your space. Dimmable with all types of dimmer and suitable for both indoor and outdoor applications. Ideal for use with exposed socket lamps and fixtures with a medium (E26) standard base so the historic filament design could be fully enjoyed.