I want to do my part in helping save the nature by starting to use renewable sources of energy for my daily needs. I have read in some magazine about some garden lights that light up in the night after being charged up the whole day by sun. I am planning to get that installed in my garden too. But I have some queries pertaining to this. Are these solar power garden lights expensive? Where can I buy these solar power garden lights? I would be really glad if someone can help. Thanks.