A solar tube (aka sun tunnel) is a great way to make use of natural sunlight indoors (besides windows!)

2109 points, 200 comments.

http://9gag.com/gag/av5m7Oqhttp://9gag.com/gag/av5m7Oq0001-01-01 00:00:00Z2021-06-28 10:10:33Z