On new iPhone 7, screen lights up on movement - is this normal?

Sounds like you are using Nightshift under display and brightness. I have mine so it is a lower light setting starting at 6 pm. Just go into settings, Display and Brightness and it should be the second one down. You can turn it off by clicking on the Nightshift arrow or custom it for times you would like it too go dimmer or brighter.

I love the feature, I accidentally turn mine off but didn’t notice it till I ran my iPhone over with my car! Thank God I have a good military case, no damage.

My screen sometimes lights up sometimes it's get dim I don't know why I kept everything off buts I thing I am facing software issue. Help pl

I've been having this same issue for a few days, first though was raise to wake somehow got turned on but wasn't. It has been driving me absolutely bananas. Saw this post today and somehow it worked. Why??? I don't know, but thank you!!!!

Thank You So Much I Swear That Stupid Feature Was Low Key Killing My Batter

Brilliant job, thanks mate

It was most likely set like that in the first place. No problem at all :)

Hope it’s working.

Thank you! Problem resolved - it was driving me crazy.

Yes, this is a new iOS 10 feature called "Raise to Wake", where you can check notifications on the lockscreen without hitting the power button or home button. I'm not sure if I like it or not myself but I currently still have it enabled.

To turn this off, go to Settings, Display & Brightness, and toggle Raise to Wake OFF.

I've played around with it a bit and it mostly activates when moved from horizontal to vertical (e.g. picking it up from laying on a desk), but not from say, low vertical to high vertical. So depending on how you carry the phone (pants pocket, jacket pocket, holster, backpack, etc.), it may or may not light up unintentionally.

Try settings > general > accessibility > turn on 'bold text' > (iPhone will restart) > go to settings again and turn 'bold text' off. Maybe this will fix the cause of your problem?