|
| |
Design Tips for Quality
Industrial Lighting
|
 | To achieve uniformity, do not exceed recommended spacing criterion.
Uniformity reduces eyestrain and fatigue.
|
| For proper fixture layout, the maximum distance from the wall for
the first row of fixtures should be half the distance between the fixtures.
Closer distances to the wall are often preferred.
|
| To reduce glare, increase the brightness of the ceiling and/or
provide uplight. This will eliminate the harsh contrast between ceiling and
light source. Use fixtures that shield the lamp with a lens or louver.
Select fixtures that minimize luminance at high angles.
|
| When lighting assembly lines with fluorescent sources, run fixtures
parallel to the assembly lines. If this isn’t possible, provide shielding.
|
| If lighting a large open area, select a fixture that directs most
of its light downward--one that has a narrow distribution. If lighting a
warehouse with storage racks, choose a fixture with a broader distribution
(light coming out at higher angles).
|
| Be aware that large machinery or obstructions may require
supplemental lighting or wide distribution luminaires to illuminate vertical
surfaces and to prevent shadows.
|
| In many industrial areas, certain machinery, assembly and inspection
areas require higher illuminance than other areas. It is good lighting
practice to increase the number of fixtures, the number of lamps per fixture
or use higher wattage lamps in these areas to provide for the additional
illuminance.
|
| An open, ventilated fixture is generally better because it allows
the ballast and lamp to operate cooler thus extending life. It provides for
uplight which reduces harsh contrast, and it creates a chimney effect
resulting in less dirt accumulation and increased light output. However,
there are applications where extensive dirt and other particles combine with
moisture and collect on reflective surfaces and lamps thus reducing light
output. These areas require enclosed and gasketed fixtures. Charcoal filters
with enclosed HID products allow the fixture to breath thus keeping it
clean.
|
| Regular cleaning can increase light output 20%; therefore, keep
lighting equipment clean and in good operating condition
|
| Account for correct reflectances and light loss factors in the
design. Improper values can result in dramatic variations between design
illuminance and the installed illuminance. Always consider lamp lumen
depreciation factors for HID and fluorescent lamps.
|
| To reduce energy costs, use low ambient lighting with supplemental
task lighting.
|
| Typical horizontal work plane height:
3’ for assembly/inspection/sport activities
0’ for open storage/warehousing areas
|
|
