Next time try asking for a law or traffic rule which states that it is illegal to use LEDs. Unless there is a written law or traffic rule never pay a fine.
I always argue with normal traffic police when they top me and ask for a licence. Its not their duty nor do they have the authority to do that. They can only ask you to provide identification and something to verify that it is your car but they cannot ask you for a drivers licence.
Same is the case with traffic police. Traffic police cannot ask for the book of your car as it not their concern that if its your car or a stolen car or whatever, they can only request a licence from you