For some reason, this year's Solstice armor does not have a separate non-glow style that you can use. If you've already imbued your armor with the glow, you lose out on having a non-glowing style for transmog purposes. Unsure if this is intentional, but it's making me hold off from getting the glow on any of my armor until I know for certain I'd have access to a non-glow variant for my fashion. I don't want to miss out on the glow either, but I'd much rather have a plain set- if I had to only pick one.