Why was there a tax on windows in Georgian times?

I wrote this for my english project on georgian times...

In the Georgian era, there was a huge tax on Windows. This was because England needed money for war and it was an easy way for the English government to get the money. Because of having to pay the tax, the number of Windows you had would be a sign of wealth etc. Poor people sometimes only had one window on each floor. Some more people even had to brick up Windows to try and avoid paying any extra tax. One main draw back for the lower class was that blocking out the Windows stopped light getting in, and if there was no natural light then they were going to have to pay more money for lighting anyway. Was there really a point to this? Did they really save any money by blocking out their Windows, paying less tax and paying more money for lighting?

hope it helps somehow! :D