Forum discussion
NC-v4 SSc6: Light pollution reduction
Hi,
In our design we have lighting fixtures placed facing up at the bottom of an external water fountain. Should I treat these fixtures as 100% upward light or is there any exception/reduction for this type of luminaires under water?
Thank you in advance.
Manuel
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Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
731 thumbs up
September 29, 2020 - 11:53 am
I would count this as 100% uplight.
Glenn Heinmiller
PrincipalLam Partners
96 thumbs up
September 29, 2020 - 12:12 pm
You might be able to make the argument to make a small reduction, say 10%, but you'd have to explain that you are doing that and the reviewer might not buy it. And a 10% reduction isn't probably going to help you much anyhow, unless you happen to be right on the threshold of compliance
Manuel Martin Delgado
Buro Happold Polska Sp. z o.o5 thumbs up
October 26, 2020 - 9:25 am
Thank you for the replies.
We will count 100% uplight as worst case scenario. On the other hand, I wonder how to count it for the power allowance section. I believe this should be a non-tradable lighting, however I am not sure under what surface category type should fall. Any suggestion will be appreciated.
Bill Swanson
Sr. Electrical EngineerIntegrated Design Solutions
LEEDuser Expert
731 thumbs up
October 28, 2020 - 9:29 am
9.4.2 Exterior Building Lighting Power.
Exceptions:
1. Lighting used for the following exterior applications is exempt when equipped with a control device that complies with the requirements of Section 9.4.1.4 and is independent of the control of the nonexempt lighting:
f. Lighting for water features.
Megan Kris
1 thumbs up
October 28, 2020 - 11:44 am
100% uplight is what should be counted in.