We've been thinking of fixing up our building's little rear garden and went searching for lighting options that wouldn't require complicated new wiring. Our favorite option was this set of solar string lights from Solar Illuminations. The party lights are exactly the twinkling little lights we had imagined for the garden, and they're self-sustained by solar power. We want to find out more before taking the plunge, but these look promising so far..
Each string is equipped with a weatherproof solar panel that would be located to receive light. It feeds a string of 104 LED bulbs in white, amber, blue, green, or red. Unfortunately, the white bulbs are sold out. But amber might make a nice warm glow. The set sells online for $90.