SnapPower’s SnapRays Guidelight features built-in LEDs that pull power from electrical contacts built into the outlet cover. The reinvented nightlights replace standard duplex or décor-style wall outlet cover plates so both outlets are always available. Package prices vary. A pack of 10 guidelights costs $120. The maker says each Guidelight costs less than 10 cents per year to operate and lasts up to 25 years. snappower.com
