Yes agreed, its where I have my head on these type of things but applying a bit of reality, people in offices lit by flourescents in front of a screen for hours on end etc at the exclusion of red light balance which the sun does have.
That’s a somewhat different argument to blue light somehow affecting mitochondrial cytochrome oxidases though.
Sorry I was still having the ciracdian rhythm theory on my mind when reading the comment, which is my reason for the glasses 
Seems plenty of research on the topic.
Many many articles from different authors.
OK - that’s in the context of glaucoma though - but I suppose less unreasonable to suggest that blue light might have some effect on cells which are directly exposed.
But most of your mitochondria are well shielded from ambient light which still makes Sara Pugh’s comments more babble than science.
Based on some science, good or bad and not just her. To consider bad dentistry can cause heart problem or dementia is similar in that the proximity to the brain makes it a vulnerabilty. Transmitting a signal via the eyes wouldnt seem too far from a similar source. That does not mean I believe it hook line and… But further study is waranted. Circadian rhythm to some is woo woo.
I make a deliberate habit of going to bed regularly around midnight, and have been doing do for some while now, and I find I’m always ready to get out of bed at 8am.
I also find now that if I go to bed sooner or later than midnight on occasions, I’m still ready to get out of bed at 8am. I sometimes go to bed at 2am or 3am, after sitting at the computer, but still rise at 8am.
I’m neither a night owl or an early bird, and once up at 8am, I’m wide awake, ready to face the day, whatever time I’d gone to bed.
I think, for me, it’s the habit of going to bed regularly at the same time every night, that has put me into what seems to be a regular rhythm, but what makes me come to life at 8am, I don’t know.
Drinking tea or coffee late into the evening doesn’t seem to affect my sleep either, but that’s another matter…
Unless its a Turkish coffee me neither. My bedtime has gotten a bit earlier and I awake at 6.3am most days with 7.30 being the other waking time.
I wake early too, and switch the radio on. I might fall asleep, but come 8am, I’m ready to swing my legs out of bed!
I have a friend who’s a prof at Warwick uni specialising in sleep. She has data suggesting the optimal amount of sleep is around 7 hours per night, so that’s probably pretty close to what you’re getting. This is based on levels of inflammatory markers that she’s been measuring over a long time.
The key thing is to get the sleep, not when you get it.
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Except for us humans darkness is a signal. We then start producing melotonin the sleep hormone. Be interested to hear your friends thoughts.
Not surprised, wether they can actually measure melotonin levels to see if there is a hormonal deficit or not. That could alter the deepness of the sleep and might have an effect on autophagy and normal cell recovery which could be only a tiny amount but over time have an effect. With most people its simply staying awake longer to respond to some email etc but couldnt read the report as its behind a paywall.
Surely it’s not simply a matter of blue light, but rather people being unable to switch off and relax before wanting to go to sleep.
Flipping around the Net is very different to reading a book.
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Probably a combination of both but without the red end of the spectrum to at least moderate the effect of blue. It must be a very slow action which is often why people dont notice like diet, could take years before people see things going wrong.