Originally Posted by cjof2003

how is 6k not just for looks as well?
All bulbs are just 4k bulbs with coloring on them to make them appear to be other color ranges, and adding a colored housing reduces light output. 4K is for optimal lighting, anything higher is just for looks. I'd say 5000-6000 is a good balance of looks and function however, as you are barely giving up any light output for a much nicer look and to most people it will "appear" brighter without being any brighter.