Site lighting and unlit surfaces

Bill Swanson

Sr. Electrical Engineer

Integrated Design Solutions

LEEDuser Expert

516 thumbs up

July 31, 2014

On the submittal form for SSc8 there is some new language that was added on the 4.0 Version of the document. Right before Table SSc8-2 there is text that says, "Include only surfaces that are provided with lighting. Unlit surfaces cannot be claimed for additional lighting power allowance." This is not part of the credit language and is not even mentioned in the Reference Guide. I would think it can be ignored.

Post a reply

Bill Swanson

Sr. Electrical Engineer

Integrated Design Solutions

LEEDuser Expert

516 thumbs up

Thu, 07/31/2014 - 13:38

Table SSc8-2 is for untradeable surfaces. I guess if you don't have a light over an ATM then it's not like there is any benefit gained. It's still adding words that are not part of the credit language.

Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Thu, 07/31/2014 - 13:55

The "added" language is there to provide clarity. A number of projects are attempting to include unlit areas. This adds to the baseline LPD without adding anything to the proposed LPD and therefore overstates the savings. It is just not a fair comparison. The description of how to do the LPD calculations is contained in the ASHRAE 90.1-2007 User's Manual. It clearly states that the "lighted area" is to be used. In addition to the credit language and the Reference Guide, the referenced standard comes into play as well.