I would rather see this in
Air, much like EmeraldTiger suggested.
Why might you ask?
Light already has a theme going on (or more),:air Air has the themes of Airborne (Passive) and Sound (Shockwave) just emerging. To have another element step into it's elemental niches at this stage is to ask for more thematic obscurity.
I think that
Air is on the right path so far, let's not intrude.