Lighting
Lighting is responsible for approximately 4% of total
electricity use in the industrial sector. There are many
opportunities for cost-effective lighting energy savings
in many industrial facilities. Measures frequently found
to be practical include:
- Consider replacing conventional high
intensity discharge lighting (high
pressure sodium or metal halide
fixtures) in medium and high bays with
fixtures that use more efficient T-5
fluorescent lamps. Fluorescent fixtures
can also be installed with occupancy
sensors to turn lights on only when
needed.
- Replace T-12 fluorescent fixtures
with T- 8 or T-5 fixtures with
electronic ballasts.
- Paint ceilings and sidewalls with a
white semi-gloss paint. This will
enhance the lighting quality at most
work stations by raising brightness
levels and softening shadows and glare
whether light is from electric fixtures
or from the sun.
- Install LED exit signs.
- Upgrade parking lot lighting to save
energy and reduce the environmental
impacts associated with lighting the sky
instead of the parking lot.
- To prevent glare from direct beam
sunlight, install reflectors "light
shelves" either inside or outside high
bay windows on the east, south, and west
to redirect light onto the white
ceiling. High bays with windows toward
the top are ideal for providing natural
lighting, but they can also be a source
of glare from direct beam sunlight.
Light shelves allow the ceiling itself
to function as a source of diffuse
natural light, creating an attractive,
virtually shadow-free lighting
environment at the work stations below.
- Install and adjust automatic dimming
controls to take advantage of
daylighting. This approach keeps most
outside light out of the field of view,
thereby controlling for glare, producing
better distribution, and lowering
cooling costs. For more info see
http://www.daylighting.org/cooldaylighting.php.
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