Solar Bottle Bulb- cheap solar tube for chicken coop

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http://www.youtube.com/watch?v=1umwvQ_hMHQ&feature=related#

These are excellent improvements on the Solar Bottle Bulb from Liter of Light, using black flashing from Home Depot, roofing tar, duct tape over the cap, and a wire holding the bottle wrapped in aluminum foil as a reflector. Add a bit of bleach to the water to prevent algae from forming.

Can't wait to try it!