[from occupied ga]

What are windows for? AND You can probably spread around the light a bit more, but you can't get more light in through the hole than hits the hole to start with (First law) In fact you'll get LESS light than hits the hole (Second law) Making a hole i your roof isn't making a light bulb it's just making a hole in your roof. (You can't rollerskate in a buffalo herd either) I reiterate BFD.

[null and void]

Then I suggest VERY STRONGLY that you do not use this invention.

[agere_contra]

you can't get more light in through the hole than hits the hole to start with

The thing is you have extended the 'light-catching area' above the roof. So you have increased the amount of light coming through the roof at all times of day except noon.

[bgill]

You obviously didn’t read the article. These people can’t afford electricity much less window glass. These put out as much light as a 40+ watt bulb. There is no need to be so negative. Check out this link for good videos on these.

http://www.theblaze.com/stories/2013/08/14/this-guy-used-only-a-plastic-bottle-and-water-to-create-light-like-that-of-a-60-watt-bulb/