Here is a lamp socket adapter that turns any lamp into a USB charging station for your smart gadgets. LampChamp has an on/off switch too. It offers 2 amp fast charging for your smartphones, tablets, and e-book readers. To get started with it, remove your existing light bulb, screw in LampChamp, and replace the bulb.
LampChamp is designed to fit any lamp. Costs under $20 at this time.