Legal limits on headlight intensity have been increased several times. In the US, before 1978, it was 37,500 candela. Now, it's 150,000. This isn't just a techn

Legal limits on headlight intensity have been increased several times. In the US, before 1978, it was 37,500 candela. Now, it's 150,000. This isn't just a technology issue; it's not terribly difficult to get 150,000 candela from a halogen incandescent bulb given a decent size reflector or a focusing lens.