2.3: Lighting

(95 maximum points possible)

2.3.1 Lighting Power Density (40 points)

GREEN GLOBES #2.3.1.1 Is the total installed interior lighting power density (LPD) of the space at or below the lighting power density requirement in Table 2.3.1.1-A Building Area Method or Table 2.3.1.1-B Space-by-Space Method)?

• Yes, Building Area Method (40 points) 
• Yes, Space-by-Space Method (40 points) 
• No (0 points)

Tooltip

Lighting power density for connected lighting circuits is the energy use (in watts) per square foot for lighting. The values in these tables are adapted directly from ANSI/ASHRAE/IESNA Standard 90.1-2010 and addendum (Tables 9.5.1 and Table 9.6.1). Provide calculations to the Green Globes Assessor for verification.

Assessment Guidance

The values in the tables are from ANSI/ASHRAE/IESNA Standard 90.1-2010 and addendum. LPD calculations and results shall be provided to the Green Globes Assessor for review. Such calculations are typically included with permit set drawings and specifications.

References 

• ANSI/ASHRAE/IES Standard 90.1-2010

2.3.2 Interior Automatic Light Shut-Off Controls (30 points)

GREEN GLOBES #2.3.2.1 How many light fixtures have time-scheduling devices and/or individual occupant-sensing devices? 

• >50% (30 points) 
• 30% - 50% (20 points) 
• 10% - 29% (10 points) 
• <10% (0 points) 
• No (0 points)

Tooltip

Time-scheduling devices must control zones no more than 25,000 ft2 (2,320 m2 ) per floor. There must be manual override switching devices that control zones no more than 5,000 ft2 (465 m2 ), and these must allow lighting to stay on for no more than two hours. Individual occupant-sensing devices must control zones no more than 2,500 ft2 (232 m2 ) in spaces smaller than 10,000 ft2 (930 m2 ). For spaces that are larger than 10,000 ft2 (930 m2 ), the control zones must be no greater than 10,000 ft2 (930 m2 ). The occupant-sensing devices should also turn off all lighting in controlled areas within 30 minutes of all occupants leaving the area.

Assessment Guidance

Time scheduling controls can be provided via a centralized system or via a digital fully-addressable system. Centralized controls can be used to automatically turn on, turn off, and/or dim lighting at specific times. Centralized control strategies can also integrate lighting controls with other building systems such as mechanical or security systems. A digital fully-addressable lighting control system can address an individual ballast or groups of ballasts. These systems are local, or integral, to the luminaire itself and are not housed in a central cabinet. The "control wiring" is independent of the "power wiring" and generally provides the highest degree of flexibility. When space configuration or occupant needs change, the system can respond by reassigning the ballasts accordingly. These lighting systems can be integrated with building automation or energy management system.

For the Green Globes Assessor’s review, the project manager can submit the electrical engineer’s lighting plans as long as there is sufficient controls information listed or noted on the plan. In lieu of controls information on the drawings, a separate lighting controls plan should be presented that outlines different lighting controls zones and the control strategy used in each.

2.3.3 Light Reduction Controls (25 points)

GREEN GLOBES #2.3.3.1 How many interior light fixtures have lighting controls that can reduce the total connected lighting load by at least 50% from full lighting using any of the following technologies: 

Dual switching of alternate rows or luminaires?

AND/OR 

Switching of individual lamps independently of adjacent lamps within a luminaire?

AND/OR 

Switching of each lamp or luminaire?

AND/OR 

Occupancy sensors within the space? 

• >50% (25 points) 
• 30% - 50% (20 points) 
• 10% - 29% (10 points) 
• <10% (0 points) 
• No (0 points)

Tooltip

This criterion is based upon total light fixtures that have controls. For example, if a 2,000 sf tenant space on a floor has sensors and lighting fixtures throughout, then 50% of the light fixtures would be controlled by sensors, apportioned by total connected kW load.

Dual switches allow occupants to control one half of the lamps in a luminaire or light fixture independently with a separate switch.

A luminaire is defined as the lighting unit consisting of a lamp or lamps, while the lamp is the actual light source. A luminaire is defined as the lighting unit consisting of a lamp or lamps, while the lamp is the actual light source.

Mark “N/A” for spaces that use less than 0.5 W/ft2 (0.1 W/m2 ). Overall, the total connected lighting load (in kW) would need to be controllable so that the lighting energy across all fixtures can be reduced by at least half.

Assessment Guidance

For the Green Globes Assessor’s review, the project manager can submit the electrical engineer’s lighting plans as long as there is sufficient controls information listed or noted on the plan. If there is insufficient information, then a lighting controls plan should be created that outlines different lighting controls zones and the control strategy used in each. A sideby-side comparison of fixtures at full connected load lighting in an area relative to the same set of fixtures at half-connected load, with corresponding descriptions, would be one way to represent compliance with this criterion.

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