Alright Devin, I remember talking to you about this a long while back >.< I never got around to posting it, suppose I got to buys or something.
But I remember solving it and why you think its green! I will hopefully post renders later on, but it appears green due to the fact that In the Halo games they use a thing called cubemaps to simulate RTR. But really, none of them support RTR, Halo 3 might, but I have yet to play it. Anyways, these cubemaps are supposed to simulate reflection and shifting of reflections when you move around.
These cubemaps are a reflective looking green color that has some things in it to make it look like its reflecting something. Since this is applied to the armor, this includes the "lens" on the light cover. Natraully they are white and clear, but since the cubemap is applied, it gives off a greenish reflective look. this is what confuses you and this is what the topic is about, thats why you have those green covers on your lights.
I will try to post pictures a bit later, my computer is having trouble rendering it right now >.> .
I say White. Even the ingame lights are white when you run around...
-Doom