Spaces required to have light-reduction controls shall have a
manual control that allows the occupant to reduce the connected
lighting load in a reasonably uniform illumination pattern by at
least 50 percent.
C 405.2 Solutions
Summary
Light reduction may be achieved by dimming, lamp switching, or fixture control as long as it is done in a reasonably uniform illumination pattern.
Lighting systems shall be provided with controls as specified in
Sections C405.2.1, C405.2.2,, C405.2.3, C405.2.4 and C405.2.5 Exceptions: Lighting controls are not required for the following: · Areas designated as security or emergency areas that are
required to be continuously lighted. · Interior exit stairways, interior exit ramps and exit passageways. · Emergency egress lighting that is normally off.
Occupant sensor controls shall be installed to control lights in the following space types:
Classrooms/lecture/training rooms ,Conference/meeting/ multipurpose rooms, Copy/print rooms, Lounges, Employee lunch and break rooms, Private offices, Restrooms, Storage rooms,
Janitorial closets, Locker rooms, and other spaces 300 square feet
or less that are enclosed by floor-to-ceiling height partitions,
Warehouses.
Occupant sensor controls shall comply with the following:
· Automatically turn off lights within 30 minutes of all occupants leaving the space. · Be manual on or controlled to automatically turn the
lighting on to not more than 50 percent power.
· Shall incorporate a manual control to allow occupants to turn lights off.
In warehouses, the lighting in aisle ways and open areas shall be controlled with occupant sensors that automatically reduce
lighting power by not less than 50 percent when the areas are
unoccupied. The occupant sensors shall control lighting in each
aisle way independently and shall not control lighting beyond the
aisle way being controlled by the sensor.
Spaces required to have light-reduction controls shall have a manual control that allows the occupant to reduce the connected
lighting load in a reasonably uniform illumination pattern by at
least 50 percent.
Daylight-responsive controls shall be provided to control the
electric lights within daylight zones in the following spaces:
• Spaces with a total of more than 150 watts of general lighting within sidelight daylight zones.
• Spaces with a total of more than 150 watts of general lighting within top light daylight zones.
controls shall be provided within each space for control of lights in that space and shall
comply with all of the following:
• Lights in top light daylight shall be controlled independently of lights in sidelight daylight zones.
• Daylight responsive controls within each space shall be configured so that they can be calibrated from within
that space by authorized personnel.
• Calibration mechanisms shall be readily accessible.
• Where located in offices, classrooms, laboratories and library reading rooms, daylight responsive controls shall dim lights continuously from full light output to 15 percent of full light output or lower.
• Daylight responsive controls shall be capable of a complete shutoff of all controlled lights.
Lighting for exterior applications other than emergency lighting that is intended to be automatically off during building operation, lighting specifically required to meet health and life safety
requirements or decorative gas lighting systems shall:
• Be provided with a control that automatically turns off the lighting as a function of available daylight.
• Where lighting the building façade or landscape, the lighting shall have controls that automatically shut off
the lighting as a function of dawn/dusk and a set opening and closing time.
• Where not covered above, the lighting shall have controls configured to automatically reduce the connected lighting power by not less than 30 percent from not later than midnight to6 a.m.,from one hour after business closing to one hour before business opening or during any period when activity has not been detected for a time of longer than 15 minutes.
Buildings shall comply with at least one of the following:
• More efficient HVAC performance.
• Reduced lighting power density
• Enhanced lighting controls
• On-site supply of renewable energy
• Provision of a dedicated outdoor air system for certain HVAC equipment
• High-efficiency service water heating
The LLLC
luminaire shall be independently capable of:
• Monitoring occupant activity to brighten or dim lighting when occupied or unoccupied, respectively.
• Monitoring ambient light, both electric light and daylight, and brighten or dim artificial light to maintain desired light level.
• For each control strategy, configuration and
reconfiguration of performance parameters including;
bright and dim setpoints, timeouts, dimming fade rates,
sensor sensitivity adjustments, and wireless zoning configurations.
Occupant sensor controls in open plan office spaces shall comply with all of the following:
• The controls shall be configured so that general lighting can be
controlled separately in control zones with floor areas not greater than
600 square feet (55 m2) within the open plan office space.
• The controls shall automatically turn off general lighting in all control
zones within 20 minutes after all occupants have left the open plan
office space.
•The controls shall be configured so that general lighting power in
each control zone is reduced by not less than 80 percent of the full
zone general lighting power in a reasonably uniform illumination
pattern within 20 minutes of all occupants leaving that control zone.
•The controls shall be configured such that any daylight responsive
control will activate open plan office space general lighting or control
zone general lighting only when occupancy for the same area is
detected.
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