2 Litre Skylights

Apologies if this has been posted before...

I thought this was an excellent lighting solution for dark buildings with corrogated tin roofs, such as sheds or perhaps chicken coops.  A 2-litre bottle is filled with water and bleach and attached through the roof, dispersing as much natural light as a 50-watt bulb.

Excellent for off-the-grid!  A cheap solution that keeps a little more plastic out of our landfills.

http://www.youtube.com/watch?v=_zMAWztZ6TI

I got really excited about that when I learned about it.  Really good idea.  I'm thinking of trying it farther North by adding reflectors around the neck of the bottle sticking out the roof.