When he is fully transformed into light form and can travel as light, yeah I think he is LS.
Well, he IS light so what ever his speed is that is the speed of light, logically. He can just walk around casually, and that will be light speed.
Now seriously, he didn't show that he can move that fast, and if someone will give him that feat just because he is supposed to have every qualities of light, then Akainu can't be Magma-Magma devil fruit user, but rather Lava-Lava (for obvious reasons).
The apes are kinda angry and are thinking they want a planet all to themselves.