Here's some information on the California Vehicle code, as it pertains to 4x4 rigs, especially ones that have been lifted or lighted (or both:-). I found this information via WAIS at: http://www.leginfo.ca.gov/calaw.html VEHICLE CODE SECTION 24008. It is unlawful to operate any passenger vehicle, or commercial vehicle under 6,000 pounds, which has been modified from the original design so that any portion of the vehicle, other than the wheels, has less clearance from the surface of a level roadway than the clearance between the roadway and the lowermost portion of any rim of any wheel in contact with the roadway. VEHICLE CODE SECTION 24008.5. (a) No person shall operate any motor vehicle with a frame height or body floor height greater than specified in subdivisions (b) and (c). (b) The maximum frame height is as follows: Vehicle Type Frame Height (1) Passenger vehicles, except housecars ...................... 23 inches (2) All other motor vehicles, including housecars, as follows: Up to 4,500 pounds GVWR ........ 27 inches 4,501 to 7,500 pounds GVWR ..... 30 inches 7,501 to 10,000 pounds GVWR .... 31 inches (c) The lowest portion of the body floor shall not be more than five inches above the top of the frame. (d) The following definitions govern the construction of this section: (1) "Frame" means the main longitudinal structural members of the chassis of the vehicle or, for vehicles with unitized body construction, the lowest main longitudinal structural members of the body of the vehicle. (2) "Frame height" means the vertical distance between the ground and the lowest point on the frame, measured when the vehicle is unladen on a level surface at the lowest point on the frame midway between the front axle and the second axle on the vehicle. (3) "GVWR" means the manufacturer's gross vehicle weight rating, as defined in Section 390, whether or not the vehicle is modified by use of parts not originally installed by the manufacturer. VEHICLE CODE SECTION 24400. During darkness, every motor vehicle other than a motorcycle, shall be equipped with at least two lighted headlamps, with at least one on each side of the front of the vehicle, and, except as to vehicles registered prior to January 1, 1930, they shall be located directly above or in advance of the front axle of the vehicle. The headlamps and every light source in any headlamp unit shall be located at a height of not more than 54 inches nor less than 22 inches. VEHICLE CODE SECTION 24401. Whenever any motor vehicle is parked or standing upon a highway any headlamp that is lighted shall be dimmed or on the lower beam. VEHICLE CODE SECTION 24402. (a) Any motor vehicle may be equipped with not to exceed two auxiliary driving lamps mounted on the front at a height of not less than 16 inches nor more than 42 inches. Driving lamps are lamps designed for supplementing the upper beam from headlamps and may not be lighted with the lower beam. (b) Any motor vehicle may be equipped with not to exceed two auxiliary passing lamps mounted on the front at a height of not less than 24 inches nor more than 42 inches. Passing lamps are lamps designed for supplementing the lower beam from headlamps and may also be lighted with the upper beam. VEHICLE CODE SECTION 24403. Any motor vehicle may be equipped with not to exceed two foglamps which may be used with, but shall not be used in substitution of, headlamps. Foglamps shall be mounted on the front at a height of not less than 12 inches nor more than 30 inches and so aimed that when the vehicle is not loaded none of the high-intensity portion of the light to the left of the center of the vehicle shall at a distance of 25 feet ahead project higher than a level of four inches below the level of the center of the lamp from which it comes. VEHICLE CODE SECTION 24404. (a) A motor vehicle may be equipped with not to exceed two white spotlamps, which shall not be used in substitution of headlamps. (b) No spotlamp shall be equipped with any lamp source exceeding 32 standard candlepower or 30 watts nor project any glaring light into the eyes of an approaching driver. (c) Every spotlamp shall be so directed when in use: That no portion of the main substantially parallel beam of light will strike the roadway to the left of the prolongation of the left side line of the vehicle. That the top of the beam will not strike the roadway at a distance in excess of 300 feet from the vehicle. (d) This section does not apply to spotlamps on authorized emergency vehicles. (e) No spotlamp when in use shall be directed so as to illuminate any other moving vehicle. VEHICLE CODE SECTION 24405. (a) Not more than four lamps of the following types showing to the front of a vehicle may be lighted at any one time: (1) Headlamps. (2) Auxiliary driving or passing lamps. (3) Fog lamps. (4) Warning lamps. (5) Spot lamps. (6) Gaseous discharge lamps specified in Section 25258. (b) For the purpose of this section each pair of a dual headlamp system shall be considered as one lamp.