if you look at the wiring harness coming out of the headlight switch (you will have to take the panel under the steering column out to get to it), you will find an orange/blue striped wire. Use a t-tap to make a parallel connection with this wire and the neons. Just be careful. If your neons pull a high amperage, you could melt the orange/blue wire and potentially that entire harness. Not sure what an acceptable amperage would be. I think the orange/blue wire is 14 or 16 gauge. Do a google to find out the highest amperage 14 or 16 gauge wire can take and compare it to the draw on the neons.
If the neons draw too much, pm me and I'll tell you how to make it work so the current doesn't pass through the headlight switch, but the headlight switch still controls your neons.
in that case, if you are dead set on using the headlight switch, wire it like I said before, and add a "cop" switch either in series between the headlight and neon, or neon and ground. seems like more work that way, but its really about what he wants to do with HIS car. There is always a way.
even though we do have strict rules ih cali for parts neon in the car hasnt been a problem for me in the past. i just dont like it plugged into my cigarrete lighter because that is where my radar detector is. are there any other things i can do?