In some spaces with simple geometry, you can actually perform these calculations by hand (see the IESNA handbook for formulae and more details). You can even measure them directly using a photometer. There are also some lighting design and daylighting simulation programs that perform these calculations. Look for a program that runs on a radiosity or ray-tracing engine, will model point source lighting, and will calculate illuminance on any specified plane. 

Yes, as long as having only one circuit on provides between 30%–70% of the maximum lighting level.

No. The contribution of daylight is excluded from the three lighting level requirements in lighting controls. Lighting systems must be able to meet the controllability requirements separate from any operable shades. This applies to both individual workstations and multi-occupant spaces.

The controls, lamp specifications, and surface reflectance strategies are all appropriate for spaces that incorporate daylighting and will even help with your daylighting strategy.

The requirements aren’t too unreasonable and can be achieved by balancing out darker colors with glossier textures (or vice versa). In fact, the reflectance values in this credit are on par with those listed as “default” finishes for evaluating daylighting in Core & Shell buildings. Because the thresholds are based on an area-weighted calculation, there’s also some flexibility in selecting accent materials and providing variety that way.

Adjustable lights are excluded from the requirements for direct vs. indirect lighting but do need to be included for CRI and lamp life.

Look on the manufacturer’s specification sheet. It’s a separate measurement from color temperature and light intensity.

For CI projects, calculations must be done at the system level for any AHU providing outside air to the tenant space.

Teams may choose to substitute ASHRAE 62.1-2010, Sections 6.4.1-6.4.2, for ASHRAE 62.1-2007, Section 5.1.1, to document compliance with IEQp1 for naturally ventilated buildings. ASHRAE 62.1-2010 adds geometric requirements that extend the allowed naturally ventilated floor area based on ceiling height and opening configuration.

Local codes may be used to meet the prerequisite if the project team can show equivalency with Sections 7 through 7 of ASHRAE Standard 62.1-2007. Projects outside the US can now also choose to comply with the minimum requirements of Annex B of CEN Standard EN 15251:2007 Ventilation for Nonresidential buildings.