For real. Those light bars are for when you are out back in Bumfuck, Mississippi. Not the damn interstate.

In Colorado at least, you'd get a ticket for not having physical light covers installed on any lights other than your standard headlights and (possibly, I can't remember the details) fog lights. light bars and anything else had to be covered if you were on a public road. I know of at least one case of a person actually receiving a ticket for it. that should be a law everywhere.