Safe and, use this adapter for garages, basements, workshops, door light,, ceiling lamp B22 to E27 socket extender, suitable for standard E27 screw base light Stainess steel neck, applicable for indoor use or outdoor use in a waterproof fixture 360 degree bendable, you could give light to a special part according to your needs Lower / Make your bulbs in recessed fixtures out and extend your existing B22 screw mount / fixture