Keeping blue light, right?

Hello motor talker, so we my buddies and I were caught while driving with blue light the other day. Is there a Owi of 20€. But now the policeman has just kept my blue light. Could he do that or can I file a duty inspection complaint? He finally took away my property from me and didn’t justify it, he would have had to pay me at least. Or can he really do that and I have to order a new one now? If I now have a new one for myself. s has to order, would make a hundreds of collection order from china, since the unit price is spott cheap. Thanks for your help