In Lebanon and Sheridan, district officials complain of LED bulbs that flicker and burn out quickly, distracting from learning because they are ill-suited to work in the existing light fixtures.

Red-light therapy is getting the green light in some health circles, but it’s early yet to say whether that’s a good thing. The treatment, a type of light therapy called photobiomodulation ...

New research has found fluorescent coloured cooling materials ... And the way that big built surface absorbs and reflects light and solar radiation from the Sun can affect not only ambient ...