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Cooper Lighting McGraw-Edison PSL User Manual

Page 3

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t h e a r c h i t e c t u r e o f f o r m a n d l i g h t

PSL Parking structure LUMINAIRE

The task defined

A parking garage is not a parking lot, at least when it

comes to lighting. A parking garage is a long, narrow

interior space with walls, beams and ceilings and

therefore is a more complex visual and psychological

environment. It’s one of the few places where vehicles

and pedestrians intermix in close, cramped quarters and

a multitude of visual tasks exist simultaneously.

This cutoff luminaire provides good maintained horizontal
footcandles and has very sharp cutoff to limit light into
drivers and pedestrians eyes. It falls short at elevations
above the horizontal, where vertical foot-candles are on
walls, ceilings, cars and people. Lighting concerns with
these products ranged from its strobe effect to getting
enough illumination between parked cars and between
fixtures.

The second type of fixture

historically used is the

refractor system. (fig. 2)

Refractors bathe the interior of the garage,
walls, ceilings and cars in uniform vertical
illumination. However, refractor systems are
known for throwing light everywhere
indiscriminately, meaning excessive
brightness for the driver, the pedestrian
and the outside world.

Mcgraw-edison

Brings a fourth dimension into the three-dimensional lighting of the garage environment: that of comfort. The McGraw-Edison
PSL luminaire combines both attributes of reflector and refractor into one unit. It provides proper 3-D illumination for the visual
tasks involved as well as allowing designer control over driver glare and light trespass.

Parking garage luminaires have been divided into two classic types.

First, the reflector or cutoff luminaire. (fig. 1)

FIG. 2

FIG. 1