Halogen pros and cons: http://www.familyhandyman.com/DIY-Projects/Lighting/Home-Lighting/the-pros-and-cons-of-halogen-bulbs/View-All
LED pros and cons: http://www.greenerpittsburgh.com/greener-life/articles-and-tips-life/35-the-pros-and-cons-cfl-vs-led-lights
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