There are 6.6 Billion people on the planet. Not everyone has a light bulb but there are enough people out there who do that the average bulb per person is probably around five.
The most popular bulb is 60 watt, which outputs around 70 candle power.
This means the world is now 462,000,000,000,000 candles brighter then it was just a few hundred years ago. Now the human eye was not meant to handle this kind of light. Which probably explains why the eye care industry has prospered so much.
Lets go back a scant 1000 years. No one was wearing glasses! Now there are factories pumping out hundreds of thousands of lenses each day. This Global Brightening crises is being ignored by the main stream media!
FIGHT THE LIGHT.
I am going to have to sell black ribbons to stop this horrible destruction of our ocular environment!!