This is a 3-part article on building a solar lantern. It’s a well-documented project, and there are a lot of pictures of the build process. Make sure to check out parts 2 & 3 for the complete build. The links are at the top of the article.
The solar lantern is composed of 2 main modules. The charging module, and the lighting module. The lighting system would be an LED or a number of LEDs connected to a power source. The charging system would be a way to charge the battery via small solar cell.
Read more about making your own Solar Lantern
How to make a Sun Jar