One thing I am already doing to help make the world a little bit greener is to not use all of the lights in my classroom. (crunchydomesticgoddess.com)
As expected there's also clearly defined cones of vision, and good use of light to further indicate what you can and can not see. (wolfsgamingblog.com)
In the summer mostly light colors are favored, so designer also make use of lighter color tones. (stylesgap.com)