'Nice And Bright': These Solar Security Lights Are Just $12 At Harbor Freight

You don't have to spend a lot in order to have solar security lights for your home. Here's a set that only costs $12 at ...
IEEE

Solar Light Concentrator of Fiber Optic Daylighting System using Parabolic and Hyperbolic Reflectors

Abstract: This study presents the design and optimization of a solar light collector for fiber optic daylighting systems, utilizing a dual-mirror configuration consisting of a parabolic concave ...