I am unsurprised by any of them. The rural kid in me, used to light pollution being "Who left the exterior light on? The barn doesn't need to see in the dark!".... Yeah.

Studies also show that artificial light exposure can trigger irregular hormone cycles in female mammals of some kinds. So they cycle to puberty younger, faster, and are set to "summer fertility" mode all year long. Not great. (That study was done in rodents and cats alike, btw. We have a lot in common, limbic-system wise, with the felines.)

It's also not great for bugs, btw. Bugs. Light. Breeding and migrating. *sigh*

I, however, am terrified of total darkness. Only when I'm indoors, however. If I'm camping, the natural light of stars and so on? Fine. It's no light in a house. *shudder*

Good post, Arfie.:-)

Light pollution officially reached the last corner of the globe (the Atacama desert) way back in the last millennium.

In many ways, you are lucky to be afraid of the dark, Leo. At the very least, it makes you normal. Good night sight is a curse here in the night glare of the 21st century. I am consistently stunned by what Light Agers call, "Dark." Some of the greatest lights in nature can only be seen after the sun goes down. Well. . . They used to be visible after the sun went down.

I have decent night vision, Arfie. It's my imagination that needs a tune-down...

I know, I hate you can't get decent relief from the "glow". Sometimes I secretly enjoy power outages. I miss my A/C and refrigerator, but.... That's good sleeping for me, light-wise.

We had a very long blackout here after a severe summer storm. Three weeks of no power in parts of our state. Sucked for keeping cool at night for sleeping, but wow, did we see strs.

Interesting arfie! I have been very light sensitive since my brain injury, so I have to wake up in semi-darkness with sunglasses on for @ an hour....use a light filter on my tablet wearing sunglasses...watch tv wearing sunglasses..use a sleep mask. In my research, I found that for some conditions, BI, autism, adhd, there are ongoing studies about pupil reaction...often being too slow to react allowing too much light in which is overstimulating to the brain/nervous system...in my case if I have bad sleep I started noticing my pupils were both larger than usual...I have had episodes of severe nausea/fainting with too much light too soon in the morning. Blue light..aacckk...almost as bad as sunlight. The personal PTSD trigger I understand, but I have often wondered in the fight/flight state, how pupils and or iris muscles contribute to anxiety...I would think it could. Looking at stars just feels peaceful! Hugs