HID's on a motorcycle

[driftingrx5.7]

I was wondering if HID's are illegal on a motorcycle. My father has this set in his mind that they are illegal because of the way a motorcycle sits. I can't find anything that states that HID's are illegal on a motorcycle. can you clear this up for me please?

[Sarge]

I can't find anything says you can't have them on a motor cycle... I feel anything that makes you more visable is good make sure your not blinding the other drivers