I’ve done exactly this for years now. I’m not sure if it actually reduces “blue light” enough to prevent me from triggering my brain’s “it’s daytime” mode, but

I’ve done exactly this for years now. I’m not sure if it actually reduces “blue light” enough to prevent me from triggering my brain’s “it’s daytime” mode, but I figure it’s at least allowing my pupils to stay more dilated (better night vision) Edit: I don’t make a habit of looking at my phone in bed. In addition to the “blue light” there are other things that contribute to wakefulness, such as any voluntary muscle movement (scrolling and tapping) and even just keeping your conscious brain active, which I find I do when I’m interacting with my phone.