When lighting a parking garage, it is important to tailor light level to location to improve visual clarity, ease eye strain, and increase safety. Lamps with higher CRI render colors more accurately and enable a driver to better distinguish between features and colors within the garage as opposed to casting both pedestrians, vehicles, and walls in the same poor quality light. Altering light levels within the garage also eases eye strain. The entrances and exits to the garage should have the highest levels of light followed by ramp areas.
The human eye is highly adaptable; however, it takes a few minutes for a driver’s eyes to fully adjust to a dramatic change in light levels. During the daytime, brightly lit entrances ease the transition from a darker parking garage to the bright outdoors. As the driver continues through the garage, light levels may gradually decrease. Ramps, representing a transition between the brighter, entrance lighting and the darker garage interiors, should be lit accordingly. Finally, low, uniform lighting is sufficient for parking areas.