Baxia via Amazon offers the Baxia Technology Wireless Solar Motion Sensor Light 4-Pack for $19.99 $21.99. Order via Subscribe & Save to drop the price to $18.99 $18.89. With free shipping, that's the lowest price we could find by $11. They each have 12 LEDs and a 120-degree motion detection.

Note: Be sure to cancel Subscribe & Save after your item ships to avoid being billed for future shipments.