No, what you're seeing is the lower end of visible light that's also emitted by the uv lamps. They're emitting a lot below 400nm that doesn't pass through your

No, what you're seeing is the lower end of visible light that's also emitted by the uv lamps. They're emitting a lot below 400nm that doesn't pass through your lens. Unless you've had surgery that removes or thins your lens. Letting uv in is bad in general because it's very damaging. The evolutionary question is rather what benefit the reindeer get that overcomes the drawbacks of increased retinal UV exposure.