GreenBiz.com® |
ClimateBiz |
GreenerBuildings |
GreenerComputing |
GreenerDesign |
Greener World Media
All Recent Posts on GreenBiz.com
-
OAKLAND, Calif. -- Despite being a centerpiece of celebrations the world over, fireworks displays often release toxic chemicals into the environment; researchers are developing a new generation of fireworks that shine as bright but leave less of an impact.
-
ELMSFORD, N.Y. -- Coca Cola signed a 10-year contract with UTC Power that will bring two fuel cells to a southern New York bottling plant, where they will produce enough heat and energy to satisfy nearly a third of the facility's needs. The state of New York also provided $2 million for the project.
-
GENEVA, -- Efforts by the world's leading cement companies knocked down carbon dioxide emissions from the industry’s manufacturing process by 35 percent even while production climbed by 53 percent, according to a new report by the World Business Council for Sustainable Development’s Cement Sustainability Initiative.
Sponsored Links
Energy-Saving Lamps
Each week, we answer your questions by tapping our network of experts in companies, nonprofits, government agencies, and consultancies.
How can we increase the energy efficiency of our office lighting?
The lighting fixtures most commonly used in commercial settings today are T8 lamps and ballasts, says Gregory Crew, president of GreenOrder. It is possible, however, to further increase lighting energy efficiency through the use of newer T5 lamps. These lamps deliver more light for fewer watts than T8 lamps. In fact, standard T5 lamps are 12% to 18% more efficient than T8 lamps, averaging about 96–106 lumens per watt. High output T5 lamps generate nearly twice the light output of standard T5s, as well as T8, and T12 lamps.
In addition to the energy savings, it has been estimated that T5s:
- Require 40% less glass than T8s
- Have 80% less mercury content (3mg versus 15mg)
- Have improved lumen depreciation (light stays at or close to full light output longer), so need to be replaced less frequently
However, while more efficient, T5s are not necessarily the best choice for all applications. Because the lamps tend to be brighter than comparable T8s, glare can be a problem in lower ceiling height areas where direct lighting is the desired goal. T5s deliver the best light quality when used in indirect lighting applications, or direct/indirect fixtures that shine light upward against the ceiling and downward into the workspace.
* * * * *
What do you want to know?
Send your questions to solutions@greenbiz.com.
Want to join our expert network?
Drop us a note at solutions@greenbiz.com.
---------------------------------------
Good Company helps companies and institutions improve their social and environmental practices while respecting the bottom line.
LinkedIn
StumbleUpon
Digg
Post new comment