Possible economical DIY for the wedding? Not to mention they'd double as emergency candles after. Make your own candles for less than 2 dollars a piece. you can even add scents and color. All natural soy.
Want to build your own portable solar power generator to take with you on camping trips or for use in an emergency? Goal Zero’s version of this cost $400, depending on what you include yours will under cost $150 by buying inexpensive parts from Amazon.com. Look for a parts list at http://solarburrito.com/build-your-own-solar-power-generator/.