external lighting LPD contribution to percentage energy savings

Puteri Shireen Jahnkassim

consultant

EAG Consulting Sdn Bhd

LEEDuser Basic Member

29 thumbs up

February 11, 2012

Hello there What does this mean : Ensure that no credit is taken in the proposed case for lighting reduction on tradable surfaces" Does this mean if the LPD for facade lighting for a designed building is lower/more efficient than the stated max LPD in ASHRAE i,e 2.2 W/m sq, this lower value cannot contribute to the LEED points collected under this credit Hoping this can be explained too: additional lighting power allowance cannot be claimed in the baseline model for surfaces which are not provided with lighting in the actual design Thanks and look forward

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Marcus Sheffer

LEED Fellow

7group / Energy Opportunities

LEEDuser Expert

4454 thumbs up

Mon, 02/13/2012 - 14:35

I believe that first statement should read "non-tradable". So yes no savings can be claimed for non-tradeable lighting. Basically your non-tradable wattage must be identical in the Proposed and Baseline models. Make sure that the lit areas in both cases are identical. If a corner of a parking lot is not actually lit in the design it cannot be included in the baseline.