How does this work with a lampshade or a wall sconce? Putting the light through some kind of filter must (?) narrow the difference between the kinds of light. I

How does this work with a lampshade or a wall sconce? Putting the light through some kind of filter must (?) narrow the difference between the kinds of light. In which case I've got a lot of lights that can be upgraded to LED. I'm willing to pay the high initial cost of LED lighting, assuming the light is of good quality (brightness AND color-with-lampshade) and the long-term savings are real. I suspect most HN readers come to the same conclusion.