Just to reiterate the great responses here:
42-4-212 - Spot lamps and auxiliary lamps.
(1) Any motor vehicle may be equipped with not more than two spot lamps, and every lighted spot lamp shall be so aimed and used upon approaching another vehicle that no part of the high-intensity portion of the beam will be directed to the left of the prolongation of the extreme left side of the vehicle nor more than one hundred feet ahead of the vehicle.
(2) Any motor vehicle may be equipped with not more than two fog lamps mounted on the front at a height of not less than twelve inches nor more than thirty inches above the level surface upon which the vehicle stands 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 twenty-five feet ahead project higher than a level of four inches below the level of the center of the lamp from which it comes. Lighted fog lamps meeting the requirements of this subsection (2) may be used with lower head-lamp beams as specified in section 42-4-216 (1) (b).
(3) Any motor vehicle may be equipped with not more than two auxiliary passing lamps mounted on the front at a height of not less than twenty inches nor more than forty-two inches above the level surface upon which the vehicle stands. The provisions of section 42-4-216 shall apply to any combination of head lamps and auxiliary passing lamps.
(4) Any motor vehicle may be equipped with not more than two auxiliary driving lamps mounted on the front at a height of not less than sixteen inches nor more than forty-two inches above the level surface upon which the vehicle stands. The provisions of section 42-4-216 shall apply to any combination of head lamps and auxiliary driving lamps.
(5) Any person who violates any provision of this section commits a class B traffic infraction
Found Here: Colorado Laws
and: HEADLIGHTS 24"-54" TAILLIGHTS NOT ABOVE 72"
42-4-219 - Number of lamps permitted.
Whenever a motor vehicle equipped with head lamps as required in this article is also equipped with any auxiliary lamps or a spot lamp or any other lamp on the front thereof projecting a beam of an intensity greater than three hundred candlepower, not more than a total of four of any such lamps on the front of a vehicle shall be lighted at any one time when upon a highway. Any person who violates any provision of this section commits a class B traffic infraction.
Also
42-4-207 clearance and identification.
lifted from www.colorado4x4.org as I was having server issues when I tried to go to the official site - so these laws are from 2003 and I would suggest you go to the official site.
42-4-212 - Spot lamps and auxiliary lamps.
(1) Any motor vehicle may be equipped with not more than two spot lamps, and every lighted spot lamp shall be so aimed and used upon approaching another vehicle that no part of the high-intensity portion of the beam will be directed to the left of the prolongation of the extreme left side of the vehicle nor more than one hundred feet ahead of the vehicle.
(2) Any motor vehicle may be equipped with not more than two fog lamps mounted on the front at a height of not less than twelve inches nor more than thirty inches above the level surface upon which the vehicle stands 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 twenty-five feet ahead project higher than a level of four inches below the level of the center of the lamp from which it comes. Lighted fog lamps meeting the requirements of this subsection (2) may be used with lower head-lamp beams as specified in section 42-4-216 (1) (b).
(3) Any motor vehicle may be equipped with not more than two auxiliary passing lamps mounted on the front at a height of not less than twenty inches nor more than forty-two inches above the level surface upon which the vehicle stands. The provisions of section 42-4-216 shall apply to any combination of head lamps and auxiliary passing lamps.
(4) Any motor vehicle may be equipped with not more than two auxiliary driving lamps mounted on the front at a height of not less than sixteen inches nor more than forty-two inches above the level surface upon which the vehicle stands. The provisions of section 42-4-216 shall apply to any combination of head lamps and auxiliary driving lamps.
(5) Any person who violates any provision of this section commits a class B traffic infraction
Found Here: Colorado Laws
and: HEADLIGHTS 24"-54" TAILLIGHTS NOT ABOVE 72"
42-4-219 - Number of lamps permitted.
Whenever a motor vehicle equipped with head lamps as required in this article is also equipped with any auxiliary lamps or a spot lamp or any other lamp on the front thereof projecting a beam of an intensity greater than three hundred candlepower, not more than a total of four of any such lamps on the front of a vehicle shall be lighted at any one time when upon a highway. Any person who violates any provision of this section commits a class B traffic infraction.
Also
42-4-207 clearance and identification.
lifted from www.colorado4x4.org as I was having server issues when I tried to go to the official site - so these laws are from 2003 and I would suggest you go to the official site.