Lighting Power Density: ASHRAE Lighting Compliance Documentation

elizabeth warlop

LEEDuser Basic Member

13 thumbs up

August 17, 2011

Hello, Our project is a small 1300 sqft office space. The only adjustments the clients are making to the lighting is that they are adding task lighting to the newly fabricated work stations. Given the current lighting and the additionaly task lighting and using the 'whole building approach' the client would achieve 2 credits under EA credit 1.1. My 2 questions are... If our changes are limited to task lighting, are we allowed to fill out the Lighting Compliance Documentation, and go for Credit #2? What about the Manditory provisions that are asking for sesnor controls and daylighting controls. Do we have to install those, if we have not altered any of the lighting?

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Susann Geithner

Principal

Emerald Built Environments

LEEDuser Basic Member

900 thumbs up

Tue, 08/23/2011 - 13:43

Your lighting power calculation should only include room, in which you change more than 50% of the lighting or if you add to the existing lighting power. That does also apply to task lights. For the sensors required, we always apply the mandatory provisions to the all the lighting existing or new. The lighting control credit EA 1.2 also requires you to included existing lighting no matter what. I hope that helps.

elizabeth warlop

LEEDuser Basic Member

13 thumbs up

Tue, 08/23/2011 - 21:57

Thank you very much for your reply. That was very helpful. Would switches on a timer verses occupant sensors be acceptable? Our office has switches in locations that make occupant sensors not practical.