This is still the old style, but I would have no idea where to begin with these new "plasma" ones.
I really see no difference, legally, from using a green halo vs a green bulb. I'd prefer the bulb be green, and these can't be bought in that color, so I'm making my own. It's just a daytime running light. Its purpose is to make me more visible to other traffic. I see all kinds of wacky colors on car lights these days. If I get stopped, well, then I know cops don't like it, but I don't foresee a problem.
This is gonna be sick.