Ikea has now started carrying a line of solar lights. They have lights for both indoor and outdoor use. They are affordable too no lighting option is more than $20.
I particularly like the lanterns, they would be great for the spring and summer parties. Put them out in the morning so they can charge up and then you have lighting for your party. I am definitely going to get some of these lights for my yard this summer!
Click here to see the whole line.