500 korda võimsam päikesepaneel.

There is a Fresnel lens used for a photovoltaic system that provides 500 times 
more solar energy to solar panels[11].:
http://www.websters-online-dictionary.org/definitions/Fresnel+lens?cx=partner-
pub-0939450753529744%3Av0qd01-tdlq&cof=FORID%3A9&ie=UTF-
8&q=Fresnel+lens&sa=Search#922

NASA's !!!! Jet Propulsion Laboratory, Pasadena, California

http://www.techbriefs.com/index.php?option=com_staticxt&staticfile=/Briefs/June03/NPO21051.html

Generating solar power

Fresnel reflectors are used in concentrating solar power (CSP) plants to concentrate solar energy from the sun. There is a Fresnel lens used for a photovoltaic system that provides 500 times more solar energy to solar panels^[11]. There is also a development effort to create a 50% efficient photovoltaic system using a "Rainbow Concentrator" ^[12]