fog lights seem like they would have the right affect, except this is being done for the legal requirements, and most places youre not supposed to run fogs w/o headlamps also on
edit: 08.I.05(2)
Some of these highways have mandatory daylight headlight
requirements to make your vehicle more visible to other traffi c.
You must turn your headlights on when driving through one of
these zones, regardless of the time of day.
http://www.dmv.ca.gov/pubs/curriculum/Unit%208.pdf
so im guessing drls dont technically pass, its a matter of what the cops decide to enforce