Hallomall US Online via Amazon offers this Luxury Aluminum Wireless Stick-Anywhere Motion-Sensor LED Wall Light 2-Pack for $27. Coupon code "2HCT7RD3" cuts that to $19. With free shipping, that's the lowest total price we could find for this quantity of such lights by $7. These lights measure 6.8" x 4.8" x 3.7" and can be mounted via 2-sided tape or mounting screws (both included). Four AA batteries are required (not included)