Well, it is sometimes called 'night-vision green' and while it may not be as effective as red for not impairing night vision, it provides a better light-at least for me-than red and provides much faster recovery to night sight than the white does. I suppose there are differences in people which makes it somewhat a personal experience. But for me, after it's use in the dark, I don't notice that I have been effected much as far as seeing without light.