Fog lamps must be mounted at a height between what two ranges in inches?

Fog lamps are designed to improve visibility during adverse weather conditions, such as fog, rain, or snow. The regulations regarding their mounting height are established to ensure that these lamps perform their intended function without causing glare or hindrance to other drivers.

The correct answer states that fog lamps must be mounted at a height between 12 to 30 inches above the ground. This range is optimal for illuminating the road immediately in front of the vehicle without causing excessive scatter of light that could create a glare for oncoming drivers. By adhering to this specified height, fog lamps can provide better illumination close to the ground where it is needed most in foggy or low-visibility conditions, promoting safety for both the driver of the vehicle equipped with the fog lamps and for other road users.

Mounting fog lamps either too low or too high can compromise their effectiveness. For example, lamps mounted lower than 12 inches may not provide adequate illumination for the road surface, while those above 30 inches could increase the risk of blinding other drivers. Thus, the regulation is put in place to balance the needs for visibility and safety on the roads.