Camera next box

Hi, I have recently set up a Oak Dale camera next box in my garden. I am delighted to say I have had a blue tit roosting in there for the past few nights. The camera has night vision, so in the dark you can see the light on in the box. Is this harmful to the bird? I have unplugged it in the evening just in case but would really like to watch our new friend throughout the evening. Any advice would be really appreciated. Many thanks