ECONOMICAL SAVING BULB - SOLAR PLASTIC BOTTLE BULB

This was done in Philippines. Water and bleach in bottle of coke was fitted on the roof. It absorbs and reflects sunlight and is equal to 55 watt ... Cheers to Engineers..

 

 

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http://liftyouup.blogspot.com/2012/08/can-you-do-yourself-deserving-favour.html