Glowstone Garden Light by P3 International Glowing "Rock" Makes Garden or Walkway Glow With Light. Motion Sensor Activated. Photo Sensor For Night Only Operation. In daylight, Glowstone looks like a small landscape granite boulder in flower or shrub beds. As night falls, the Glowstone garden light reacts to motion. Glows for 5-15-30 seconds (your choice) if movement occurs within a 12' range. P7400 Glowstone's operates for months on four C cells. Use the Glowstone to illuminate paths or as a garden accent light. Glow Stone Features: *Motion sensor activates for 30 seconds. *Realistic granite-look finish. *Integrated photo sensor prevents daytime activation. *Works in all outdoor locations where water does not collect. Requires dry ground. *Model: P7400 by P3 International *Power: 4 "C" alkaline batteries (not included) *Battery life: Up to 6 months. *Sensor: Passive Infrared *Range: Up to 12 ft. *Lamp Timer: 5, 15, 30 seconds (user choice) *Weight: 1 lb *Dimensions: 8" x 8 1/2" x 4" *6 Month Limited Manufacturer's Warranty Note: Extra Bulb in triangular packing inside Glow Stone box.