Solar energy is free- why not make the sun work for you? It’s infinite and creates no waste! That’s why I love having solar powered lights in my yard. They charge all day with the (FREE) sunlight, then keep my garden lit up at night. You can get some pretty decent solar lights from dollar stores, and if you are crafty, you can jazz them up and create some solar powered art. For ideas, check out this post by Gail at My Repurposed Life:
Tin Can Solar Lantern Tutorial
DIY Solar Light Chandelier
Floor Lamp Solar Light Feature for Your Patio
Easy Mason Jar Luminaries