When finding the difference between light measurements when fixtures are on and off, if the difference is above 20% but the footcandle measurement is below the Maximum Illumination Value for the ty

The only exterior lights on the building we are working on are historic light fixtures at the entrances to the garage.

Hi, We are working for G+2 Office Building to get LEED EB Rating. Further, we have completed Ext Lighting and started to work for Interior Lighting requirements.

So would the minimum performance period for this credit be 1 week or is it 90 days?

All exterior lighting was retrofitted to CFL's a few years ago and is below 50W. Do we still need to perform Option 3 and take measurements?

Our project site has a foutain/pond that has underwater lights. They are about 500 watts but down't really illuminate the surrounding areas.

To ensure that the internal lighting was not interfering on nocturnal environment at least 50% of the nighttime hours, the approach that we used was to automate all the building blinds, establishin

Does the option 2 exemption for exterior lighting apply to fixtures with ratings greater than 50 watts but using lamps 50 watts or less?

Has anyone documented Rule 3: Angle Exemption? I'm confused by the diagram in the reference guide. It is a plan view, correct?

We are working on a project, whose roof is covered by equipment for most of area. For maintenance purpose, there is 1 tube installed close to the door of roof area entrance.