I’ve mentioned lighting a couple of times in relation to morale during a disaster or emergency. Kevin from Survivalist Boards made this video last year about using the solar powered outdoor lights as indoor nightlights. It might not provide the most candlepower, but I appreciate the innovativeness. In the thread where I saw this is a decent solar set-up that would provide much more light, as well as the ability to power some small appliances, though its obviously more expensive than $4 solar lights from Walmart.
If you go this route, Eneloops are your best bet for rechargeable batteries. They are best in class and the only rechargables I buy now.