Paradise GL23877BK Solar Aluminum LED Post Cap Light for 4 x 4 Wood Posts (Black, 4 Pack) COMPATIBLE - Fits on any standard 4"x4" wood post CRYSTALLINE PANEL - More efficient than amorphous solar panels, charges faster and last longer LIGHT SENSOR - Turn ON at dusk and OFF at dawn automatically everyday with the photocell technology WEATHERPROOF - Protective frosted plastic lens and durable black finish cast aluminum body are designed to handle the outdoor elements INCLUDES - 4 x deck light; 4 x AA Ni-CD rechargeable battery; 1 x user manual. Light measures 5.3" x 3.74" x 7.05"