Skylight makes much brighter, if needed, and, if efficient during winter and can open, allow hot air to escape in summer.
Q
Designers website shows efficient design elements, such as skylights used for summer cooling. http://www.sustainabledesign.com/#!home-designs/c628
Builder's website has interesting information about efficiency: http://finishwerks.com/PerformanceHomes.html
solar shingles
Skylight makes much brighter, if needed, and, if efficient during winter and can open, allow hot air to escape in summer.
Q