F/11.0, 1/250, ISO 320.
Day 3 / 365
Sometimes you can get an idea by just turning the light on. 🙂
Interesting Fact: Electric arc lighting, invented in 1809, was much safer but far too bright for use in a small area. A smaller light was needed, and in 1880 Thomas Edison patented the first commercially viable incandescent light bulb. ( http://classroom.synonym.com/important-thomas-edison-invention-light-bulb-6305.html )