Woot offers BH 5-Pack Outlet Cover with Built-In LED Night Light: (Rounded ) for $15.99 (orig. $69.99). Free shipping for Prime Members.

Product Description:
These sleek outlet plates are designed to safely light up your home without using outlet space and without costly electric bills.
Simple and easy to install, just remove the existing outlet plate and replace it with this highly efficient, low energy night light.
The LED bulbs will last for years, keeping you and your loved ones safe, while saving money from replacing the traditional night light bulbs.

• Does not work with GCFI outlets or ungrounded outlets
• Frees Up Outlets – You can finally use all of the outlets in your house. Don’t let standard, bulky night lights dominate your hallways, bathrooms or children’s bedrooms anymore
• Energy Efficient – The Guidelight cover plate costs less than 10 cents per year to power. With just the right amount of light, you can sleep easy now
• Safe For Children – The Guidelight does not heat up like standard night lights, it does not have open bulbs or glass for kids to burn and cut themselves on
• No wiring, no batteries, no mess, just snaps on! Easy to install, it only takes about 30 seconds
• Sensors detect when its dark and lights turn on
• UL Listed