DIY Solar Lamp: Make your own Eco-Friendly Sun Jar. The principle is simple and seductively clever: solar lights that store energy during the day and release light at night. These can be purchased ready-made in a variety of colors (yellow, blue and red) but they can also be built at home.A simple, less-technical approach involves buying a conventional solar-powered yard lamp and then essentially harvesting it for key pieces to put in a jar. This is simply a way of taking an existing solar lamp design and appropriating its parts to make something more attractive for display around a house or home. A more electronically-savvy individual can take the more complex route and built a solar lamp from the ground up using small solar panels – though the aesthetic result may not be as impressive. Whatever route you choose to go, these are fun and sustainable gadgets that make it easy to go green, automate the process of turning on lights at night and can add some color to your porch, patio, garden or windowsill.