They can't take it for walking down a road unless they have reason to believe it was going to be used to brake the law and if that was the case they should have arrested you as Well. If I was you I'd be down the cop shop putting in a complaint about the officers and getting my lamp back. Not being funny but the say the can't take acid off people because it's not against the law to have it even though they know it's going to end up in some poor fcukers face so they certainly can't take your lamp