Biologically speaking, blue light performs a very specific function in your circadian rhythm. It's possible that your lights and phone are not bright enough for

Biologically speaking, blue light performs a very specific function in your circadian rhythm. It's possible that your lights and phone are not bright enough for it to be an issue; the sun is insanely bright. I do kind of doubt that the contrast has anything to do with it though. There are a lot of feedback loops in your body though, so it's entirely possible that your body produce the protein that triggers the breakdown of melatonin though. Other theory: you bulbs are blue, but are missing the particular blue that causes meletonin to be broken down by the body. I have 6500k 92 cri bulbs for most of my lighting and it definitely screws up my sleep cycle if I don't remember to switch to my 3000k area lighting. I have a really flexible schedule so I didn't notice how screwed up my schedule was for a while.