High Wire
Guru
I am surprised and disappointed someone hasn't start making add on red lens for the spot lights. They would be less offensive on the night vision.
Yes, it might reduce the amount of light but, at least you can use it at night.
If the red light is bright enough to see anything more than needed to keep you from stubbing your toe, it will still affect your night vison. I'm sure someone versed in rods and cones will chime in to clarify.