Additionally human eyes are sensitive to near infrared. Go look at a TV remote in a really dark place. Check with your phone because your phone can see it. If you can't then check with the nearest child, they'll tell you.

You lose sensitivity to this bandwidth as you get older. But if it's bright enough you'll see it. It's not like there's a hard cutoff in your eyes detection, it decays and you're very insensitive to big bandwidth, but not necessarily blind to them

Now that you mention it, I do remember occasionally being able to pick up on a faint red light in the remote control back when I was younger. It was easier to see with a phone’s camera I think?