I have an idea for my science fair project, I just need a question to test?

I want to make solar powered Christmas lights for my experiment. I will make little lights like this

http://www.evilmadscientist.com/article.php/lantern

string them up and paint the jars red and green so the light shines through teh paint. One problem, i need a question to test. Thank you

Can the sun light up a Christmas tree?

Or how do solar powered lights work?

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  4. Is this a good science fair project for a 7th grader?
  5. what would be a good title name for a science fair project?

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