To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate

To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate
A . all luminaires have full cutoff fixtures
B . all luminaires have a minimum color temperature of 3500 K
C . all luminaires meet acceptable fixture ratings for the project’s Model Lighting Ordnance (MLO) lighting zone
D . all luminaires are mounted at least three mounting heights from the lighting boundary

Answer: C

Explanation:

To achieve the Sustainable Sites Credit, Light Pollution Reduction, Option 1. BUG Rating Method, projects must demonstrate that all luminaires meet acceptable fixture ratings for the project’s Model Lighting Ordnance (MLO) lighting zone. The MLO lighting zone is determined by the site-specific characteristics and the definitions provided in the IES/IDA MLO User Guide1. The fixture ratings are based on the backlight-uplight-glare (BUG) system, which measures the amount of light emitted in different directions by a luminaire, as defined in IES TM-15-11, Addendum A2. The maximum allowable ratings for each lighting zone are given in Table 1 of the credit language3.

Reference: IES/IDA MLO User Guide; IES TM-15-11, Addendum A; Light pollution reduction