KitLily wrote:
Yes, there is evidence to show that the more light humans sleep with, the less their brains get to rest and recharge. It's only recently that we've had lights on at night e.g. streetlamps. Probably 200 years or so? Before then it was dark at night apart from the moon and stars. We need the dark to recharge.
KitLily, our science museum had a display of how to reduce light pollution. It was quite compelling. My elemetary-school aged kids were convinced. The display said that bright (glaring) lights can increase crimes.
Here's a visual of options: