Cafago offers the Lixada 22-LED Solar Powered Adjustable Double Dural Heads Wall Lamp for $21.25. Coupon code "ZL1042MG" cuts to $15.08. With free shipping, that's the lowest price we could find by $4. It features motion detection and 450 luminous flux.
Note: This ships from China, and may take up to six weeks to arrive. Also, the countdown timer on the product page does not reflect an actual expiration time and resets daily.