A lightbar for a volunteer responder? That's pretty cool. I've never seen anyone around me with a lightbar, but there are probably some people with them in other parts of jersey. We are allowed to have a blue/white flashing christmas tree for a car if we want to, I believe, however it is frowned upon to have all of that stuff. I've never seen anyone around here with a crazy amount like that. We aren't even required to have any lights at all near me. They are optional. We are allowed to have any flashing blue and/or white light we want anywhere on the vehicle. The only things we are strictly prohibited from having (unless high-ranking) are red lights, a siren, and flashing headlights and taillights. I guess it is different in every township, county, etc.
I think it's pretty interesting how it varies with this stuff from state to state. Some states are allowed to have any lights they want I think, only reds, only blues, etc. I know in new york in the 5 boroughs, especially brooklyn, most of the volunteers are Hatzolah and I've seen them with red and blue lights. Also I saw on a website that volunteer EMTs in NY have green flashing lights. Maybe around christmas time they can put up red and green to be festive lol