2-Pack WHITE Solar Hexagon Post Cap Lights with WHITE LEDS for 4X4 Hollow PVC/Vinyl/Plastic Posts Light source : Ultra Bright White SMD LEDs for each individual light. Material: Premium Heat-Resistant Plastic Operating Time: Up to 8 hours (depending on weather, regions and sunlight intensity available) 4 1/16" x 4 1/16" base (For 4 x 4 Hollow PVC/Vinyl/Plastic Posts)