Who are the best " green " commercial lighting contractors in the Midatlantic region? LEED accredited ?

Q. I am designing a LEED silver office building, and I have some questions regarding daylighting and other energy effecient lighting technologies, from a contractors practical point of view.
Thanks !

A. I don't have any suggestions for the best commercial lighting contractors. However, the U.S. Green Building Council's membership directory is a good place to start. You can access it online at no charge at http://www.usgbc.org/myUSGBC/Members/MembersDirectory.aspx?CategoryID=2&CMSPageID=140. You can retrieve results by category (Contractors and Builders) and State.

I hope this helps. Please let me know if you need more information.

Laura Barnes, MSLIS
Illinois Waste Management and Research Center Librarian

how does emergency lighting work?

Q. Like in a commercial building. Can you buy battery powered commercial lighting thats not connected to a 120volt plug? and what activates emergency lighting?
i figured, that the emergency lights would have to be connected to a 120 power supply from the building to be activated when power is cut. i just dont see how these emergency lights are triggered. unless they are connected to the buildings power?

A. Emergency lighting is always connected to the AC power, both to keep the batteries charged and to detect when to turn on.

If it were not connected to the AC power, how would you charge the batteries?

To repeat, the system is triggered by the AC power going to 0, probably by something as simple as a relay across the AC power leads.

Anyone know anyone who buys unused commercial light fixtures in California?

Q. Im looking for anyone to buy some unused commercial light fixtures that we have left over from a completed job. Does anyone have any ideas?

A. the surplus house

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