There is certainly a requirement for DOT lighting, but the codes that I am quite familiar with do not specify any wattage limitation other than the 65 watts and then they just limit the number of forward facing white lights. Anything over 65 watts does not have to be covered, and the aftermarket manufactures these lights as fog lamps, driving lamps, etc. There is nothing illegal about them. Also there is a California court ruling in regard to lighting in the spectrum of white and the spectrum including white light within the blue spectrum such as the 6000k lights. Keep on reading that vehicle code.