Section 25251.2 Of Article 7. Flashing And Colored Lights From California Vehicle Code >> Division 12. >> Chapter 2. >> Article 7.
25251.2
. Any motorcycle may be equipped with a means of modulating
the upper beam of the headlamp between a high and a lower brightness
at a rate of 200 to 280 flashes per minute. Such headlamps shall not
be so modulated during darkness.