There are recommendations on the DFT website, but as they say, when the Lighting Regs were written, HID's didn't exist. They have therefore cobbled together some guidelines which are not, as far as I am aware, law. You have to remember that it would not be in the public interest to prosecute anyone for anything like this, as it wouldn't serve any real purpose and would be a drain of public money. The cops don't even prosecute for the blue led's you see on boy racers cars, so they're not going to do anything about this. I bet if you dug around enough, you'd see that the bulbs have been gi