This solar heat ray can produce temperatures exceeding 1800 F� at 10 feet focal length to 300 F�  at 100 feet focal length.
Smaller quick version: <br> <br>https://www.instructables.com/id/TRASH-CAN-LID-concave-death-ray-solar-mirror/
brilliant! a superb way of harnessing free power for something useful
thank you:-)

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Bio: You may recognize Dan and Denise Rojas from their appearances in various made for tv movies and national commercials. As the hosts of Green Power ... More »
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