Deck and stair lighting does not get any easier than this. The Solar Deck Lights mount in the area you want the light, and the units then shine a light in four directions when it gets dark – as with other solar lights, no other wiring is required. This keeps your deck clean and clear of cabling.
The lights are designed to charge all day and give about five hours of light at night. The cool feature about these lights are their low rise design, eliminating the need for other mounting hardware.
The Solar Deck Lights cost about $25, and you can find them at Gardeners Supply.