I am pursuing this credit for a CI project as an ID credit. I am wondering, in order to comply with the overall value of 90 pg Hg/(lm*h), I need to include all my LED lamps. They naturally have no Mercury. I need them to weigh down the result of the fluorescent lamps so that the overall value complies. The text says that I may exclude non-mercury lights. But I don’t want to. I may include them, right? I know they have to be at least as efficient, but LEDs are always more efficient aren’t they? So I don’t see why people don’t include them…
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Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
736 thumbs up
January 9, 2013 - 8:42 am
You may include the LED lamps to weigh down the results like you want. But 90% (quantity) of purchased lamps must comply with the 90 pg Hg/(lm*h) limit. There's only so much you can skew the average.
Some LED lamps are garbage. But most will be better than a cheap CFL so you can count them in your calculation. I wouldn't say LED's are always more efficient. It depends. The energy star website has an excel file list of thousands of CFL and LED replacement lamps that carry the Energy Star label. There are some really efficient CFL's (some over 80 lm/W). There are also many more LED lamps that never made it on this list that can be assumed to perform poorly (less than 40 lumens / Watt).
http://downloads.energystar.gov/bi/qplist/Lamps_Qualified_Product_List.x...
Maria Porter
Sustainability specialistSkanska Sweden
271 thumbs up
January 11, 2013 - 6:23 am
Bill, thank you for your superfast reply!
I will include 100 % of all lights. It just seems as the right thing to do since I’m using this credit as an ID credit under CI. Even if my result would be a lot better by excluding 10 %. We have only made a quick calculation to see if the credit is worth pursuing and it looks ok, so we will now go into detail.
I have to ask my lighting guy how many watts the chosen LEDs were, he only mentioned that they were more efficient than CFLs.
My only experiences have been when I tried to buy LED lamps for my home. All lights I checked there were more efficient than CFLs. But I guess it could be different for commercial use.
/Maria