> I will stay up nearly indefinitely in bed if I read my phone or iPad. Read the same material on my Kindle Paperwhite and it can be difficult to stay awake mor

> I will stay up nearly indefinitely in bed if I read my phone or iPad. Read the same material on my Kindle Paperwhite and it can be difficult to stay awake more than a few minutes. I've noticed the same thing! Glad to see I'm not nuts...