How do you purchase solar panels for home lighting?

I've personally looked into it a few times in the past. Most companies that sell them nowadays have web sites (who doesn't, really?) that tell you whether they sell them in a physical store, or ordered online.

I'd suggest going through a search engine, and inputting the city, state, or province that you live in to cut down the number of search results you get. (This can also help you shop around a little for who gives the best deals.)