Elsewhere $25 and up
Today only, the retailer Daily Seals has this Motion Sensor LED Spotlight for only $15 with free shipping. It runs on 3 D-Cell batteries and lasts about a year. Perfect to install in a spot without easy access to power. Is weatherproof so feel free to install outdoors.
Mr. Beams Wireless LED Spotlight with Motion Sensor — $15 at Daily Steals. Next best is $25 at Amazon.