Streamline - Fall 2013 - (Page 19)
BY FRANK NADEAU,
use, there are
lamps, as well
as LED fixtures
of long life
Can Changing Your Plant
Lighting Save You Money?
facilities punches a substantial hole in our operating budgets. Are there any
money-saving types of lighting that will reduce this punch into a “love tap”?
LIGHTING OF OUR
Incandescent lighting is expensive and the light
bulbs are don’t live long. The tungsten electrodes
generate light by heating to a white hot temperature which gives off light. The main difficulty of
this is the electrode eventually burns away and
becomes so thin that it breaks. Another drawback
is that incandescent light bulbs convert only about
5 percent of the input energy to light; the rest is
converted to heat which is wasted. They are also
relatively short lived, especially since so many
are now being manufactured overseas without
the quality control used by domestic manufacturers. Incandescent light bulbs have a typical life
expectancy of around 1000 hours.
To answer the lead paragraph question, yes!
For exterior use, there are sodium and mercury
vapor lamps, as well as LED fixtures which have
the advantage of long life expectancy. For instance
the Mercury Vapor lamp in my back yard has had
three bulbs in 25 years. For interior use, there are
fluorescent, compact fluorescent and LED (light
emitting diode) light bulbs (Although the term
bulb is a misnomer in these usages.) These devices
have several advantages; with the LED having the
1. Lower Electric power consumption
2. Higher light producing efficiency
3. Much longer life expectancy
LED’s have further advantages:
1. LED’s are “instant on,” unlike HPSV and MV
2. Operate down to -50o C
3. Operate with both dimmers and motion sensors
They also have one major drawback: They are
• Henkel, a manufacturer of adhesives, sealants and surface treatments, installed Dialight
SafeSite LED lighting at its wastewater treatment plant in Puerto Rico. Installation of a dozen
100-watt LED fixtures to replace sixteen 250watt High Pressure Sodium lights reduced plant
energy needs by 75 percent and achieved annual
energy savings of $3500 while vastly improving
• The 17MGD City of Santa Cruz, California,
wastewater treatment plant upgraded its lighting from High Pressure Sodium and Mercury
Vapor fixtures to Dialites DuroSite LED fixtures. The plant reduced lighting energy usage
by more than 50 percent, significantly lowered
carbon dioxide emissions and realized a dramatic improvement in visibility that enhanced
security throughout the facility.
LED lighting is typically a bright white color
light whereas high pressure sodium vapor lamps are
orange and mercury vapor lamps are blue-white,
both of which cause human sight to be slightly
distorted. Think of looking for a blue car in your
local shopping center parking lot which typically
has orange HPSV lighting. The car looks black.
LED light fixtures can be more sharply
focused, reducing lighting spillover and neighbor complaints. Most LED area light fixtures are
“Dark Sky Association” compatible.
Installation of LED fixtures to replace HPSV
and MV lights to LED fixtures take less than an
hour per fixture. Manufacturers provide conversion kits and most use existing wiring further
simplifying the upgrade process.
What does this mean to us? We could improve
our lighting, reduce our energy costs, and have a
payback of the initial investment in two to three
years, and at the same time have lights that operate
for 10 to 20 years, thus reducing the maintenance
cost even further.
Table of Contents for the Digital Edition of Streamline - Fall 2013
From the President
From the Executive Director
Acronyms – Today’s Language
Drought or Flood?
Can Changing Your Plant Lighting Save You Money?
Source Water Protection Notes
Aging and Failing Infrastructure
Time for Some R&R
EXPO Coverage and Recap
Ergs, Joules and Other Stuff
Throwing My Loop
eLearning Benefi ts
Do You Know What Your VRWA Benefi ts Are
Welcome New Members
Board of Directors
Index to Advertisers/Ad.com
Streamline - Fall 2013