He earned the ticket. Look at the Federal DOT lighting laws that cover every state, he was in violation. Each color means something, must be displayed properly and must be visible from a certain distance. Certain reflectors must also be there.
People take stuff off, shrink it or change the color or add a color they like and it sets them up for a ticket. But for every one ticket, you have 100 guys why say they never bothered me
Truth is, they did not have the time.
If you have an accident, improper lighting will come to light in the courtroom. Keep what you need, add only whats legal.
Some states are allowing indirect lighting now. Strict rules on that. I will not chance it.
If he has grounds, he can beat it.
Carry the law with you. Like the Headlamp modulator, I will carry that law with me when I install it. Not all COPS know, they can site you for anything. But If you show them, you can avert a hassle.