Driving Lights

Driving lights are used to supplement vehicle headlight systems. The driving lights are installed on the front of the vehicle and provide higher intensity illumination over longer distances than standard headlight systems Figure 39-23. Vehicle design rules and regulations specify the limitations in relation to the positioning and lens configuration of driving lights. It is essential that the local regulations are adhered to when mounting or adjusting driving lights.

FIGURE 39-23
Vehicle with factory driving lights.

There are many types of driving lights available. They come in different sizes, shapes, lens pattern, and bulb wattage. In some instances, a single driving light can be installed to suit particular applications, but lights are normally installed in pairs.

Most driving lights use quartz halogen bulbs in the 55- to 120-watt range. The quality of the reflector is extremely important in driving lights to get optimum performance. Driving lights are wired so that they operate only when the high beam is operating. This safety feature ensures that driving lights turn off when the headlights are switched from high to low beam, thus ensuring that oncoming traffic is not blinded by excessive light. While many performance vehicles come equipped with driving lights, they can be added to almost any vehicle. If they are, a relay and circuit breaker should always be used for circuit protection reasons.