Why is the Aurora Bora green? This is an interesting concept. But mostly because the infrared and ultraviolet light strikes the atmosphere and creates a lot show, which are cones within our eyes cannot otherwise interpret. And therefore the electrical signals are described and illustrated or sent to our brain as green electrical signals. So in the case of light hitting hitting our magnetic field or the Earth's magnetic field, and deflecting the majority of harmful rays away, those light particles begin dancing on the atmosphere and can only be perceived as green. It's important that you understand from a design and decoration perspective, that this is not of concern that the color of the light is green.
What is important is that Variable Frequency of lot can only be understood by what our eyes can see and interpret. Our eyes can only understand green, red and blue accordingly with the cone receptors within our retina. This can be modeled on our interpretation of color applied to a home design, what the majority of our eyes will perceive as stronger color saturations as red, green, and blue.