2-Pack BLACK Solar Hexagon Post Cap Lights with WHITE LEDS for 6X6 Fence Post - GREEN NATURAL SOLAR 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) 6x6 Combination Mounting Base for 6x6 model has two sides and thus serves two functions. Inside diameter of one side is 5.75" (good for solid wood/composite posts) and inside diameter of other side is 6 1/16" (good for hollow PVC/Plastic/Vinyl posts)