Energy Conservation: Solar post cap lights are high-efficiency and energy-saving LED decorative lights for outdoor use. The light-sensitive 4x4 solar post cap lights can be fully charged in 6-8 hours under daylight. It will automatically provide lighting for 8-10 hours at dusk or in the dark.High-Quality Material: With a rating of IP65, the solar powered fence post lights are made of high molecular polyethylene material. Fence post solar lights can work regularly outdoors and in rainy and snowy days.High Brightness Lighting: The fence post lights are powered by a NiMH AA1000mah rechargeable (replaceable) battery. The solar post lights with 8 bead-shaped LEDs produce light in 15 lumens.Outdoor Decorative Lighting: The shape of the 4x4 solar post light is a square (5”×5.6” and 5”×3.6”). Solar light post cap can be installed on 4×4, 5×5, and 6×6 wood posts on deck, fence, patio, and other places.Warmly Tips: Before the first use, please tear off the film on the 4x4 post solar lights, and allow the solar light post cap to be exposed to the sun for at least 10 hours.