DEFINITIONS AND RULES OF CONSTRUCTION
FLUX is the rate of energy flow per unit area
IES LIGHTING HANDBOOK is the Illuminating Engineering Society document titled “The IES Lighting
Handbook: Reference and Applications, Tenth Edition” (2011).
IES LM-79-08 is the Illuminating Engineering Society document titled, “IES Approved Method for the Electrical and Photometric Measurements of Solid-State Lighting Products.’
IES TM-15-11 is the Illuminating Engineering Society document titled, “Luminaire” Classification Systems for Outdoor Luminaires
ACCENT LIGHTING is directional lighting designed to highlight or spotlight objects. It can be recessed, surface mounted, or mounted to a pendant, stem, or track.
CHANDELIER is a ceiling-mounted, close-to-ceiling, or suspended decorative luminaire that uses glass, crystal, ornamental metals, or other decorative material.
COLOR RENDERING INDEX (CRI) is the ability of a light source to reflect the color of illuminated objects with fidelity relative to ideal or natural light sources of the same color temperature. CRI is calculated according to CIE 13.3
CORRELATED COLOR TEMPERATURE (CCT) is a description of color of light relative to the chromaticity of the radiative emission of heated black body and reported in temperature units of Kelvin according to CIE 15
COLORED LIGHT SOURCE is a light source designed and marketed as a colored light source and not designed or marketed for general lighting applications with either of the following characteristics maintained throughout all modes of operation including color changing operation:
(1) A Color Rendering Index (CRI) less than 40, as determined according to the method set forth in CIE Publication 13.3; or
(2) A Correlated Color Temperature less than 2,200 K or greater than 7,000 K as determined according to the method set forth in IES LM-66 or IES LM-79 as appropriate.
COMPACT FLUORESCENT LAMP is a fluorescent lamp less than nine inches maximum overall length with a T5 or smaller diameter glass tube that is folded, bent, or bridged.
DECORATIVE (LIGHTING/LUMINAIRE) is lighting or luminaires installed only for aesthetic purposes and that does not serve as display lighting or general lighting.
DISPLAY LIGHTING is lighting that provides a higher level of illuminance to a specific area than the level of surrounding ambient illuminance. Types of display lighting include:
FLOOR: supplementary lighting required to highlight features, such as merchandise on a clothing rack, which is not displayed against a wall.
WALL: supplementary lighting required to highlight features, such as merchandise on a shelf, which is displayed on perimeter walls.
WINDOW: lighting of objects such as merchandise, goods, and artifacts, in a show window, to be viewed from the outside of a space through a window.
CASE: lighting of small art objects, artifacts, or valuable collections which involves customer inspection of very fine detail from outside of a glass enclosed display case.
ENCLOSED LUMINAIRES are luminaires which contain enclosed lamp compartments where ventilation openings are less than 3 square inches per lamp in the lamp compartment as defined by UL 1598.
GENERAL LIGHTING is installed electric lighting that provides a uniform level of illumination throughout an area, exclusive of any provision for special visual tasks or decorative effect, exclusive of daylighting, and also known as ambient lighting.
GU-24 is the designation of a lamp holder and socket configuration, based on a coding system by the
International Energy Consortium, where “G” indicates the broad type of two or more projecting contacts, such as pins or posts, “U” distinguishes between lamp and holder designs of similar type but that are not interchangeable due to electrical or mechanical requirements, and “24” indicates 24 millimeters center to center spacing of the electrical contact posts.
ILLUMINANCE is the area density of the luminous flux incident at a point on a surface.
ILLUMINATION is light incident on a surface of body, or the general condition of being illuminated.
INSEPARABLE SOLID STATE LIGHTING (SSL) LUMINAIRE is a luminaire featuring solid state lighting components such as LEDs and driver components which cannot be easily removed or replaced by the end user, thus requiring replacement of the entire luminaire. Removal of solid state lighting components may
require the cutting of wires, use of a soldering iron, or damage to or destruction of the luminaire.
INSTITUTIONAL TUNING is the process of adjusting the maximum light output of lighting systems to support visual needs or save energy. Institutional tuning differs from personal tuning in that the control strategy is implemented at the institutional rather than the individual user level, and maximum light level adjustments are available only to authorized personnel.
LAMP is an electrical appliance that produces optical radiation for the purpose of visual illumination, designed with a base to provide an electrical connection between the lamp and a luminaire, and designed to be installed into a luminaire by means of a lamp-holder integral to the luminaire.
LANDSCAPE LIGHTING is a type of outdoor lighting that is recessed into or mounted on the ground, paving, or raised deck, which is mounted less than 42 inches above grade or mounted onto trees or trellises, and that is intended to be aimed only at landscape features.
LANTERN is an outdoor luminaire that uses an electric lamp to replicate the appearance of a pre-electric lantern, which used a flame to generate light.
LIGHT is the luminous equivalent of power and is properly called luminous flux.
LIGHTING, or illumination, is the application of light to achieve some practical or aesthetic effect.
LIGHT EMITTING DIODE (LED) is a p-n junction solid state diode whose radiated output is a function of its physical construction, material used and exciting current. The output may be in the near ultraviolet, the visible or in the infrared regions of the spectrum.
LED LIGHT ENGINE is an integrated assembly comprised of LED packages, LED components, LED arrays,
LED modules, or LED driver, and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit through a custom connector compatible with the LED luminaire for which it was designed and does not use an ANSI standard base. (IES RP-16-10).
NON-INTEGRATED LED LAMP is an assembly comprised of an LED array (module) or LED packages (components) and ANSI standard base. The device is intended to connect to the LED driver of an LED luminaire through an ANSI standard lamp-holder (socket). The device cannot be connected to the branch circuit (ANSI/IES RP-16-10).
INTEGRATED LED LAMP is an integrated assembly comprised of LED packages (components) or LED arrays (modules), LED driver, ANSI standard base and other optical, thermal, mechanical and electrical components. The device is intended to connect directly to the branch circuit via a corresponding ANSI standard
lamp-holder (socket) (ANSI/IES RP-16-10).
LOW VOLTAGE is less than 90 volts.
LUMEN MAINTENANCE is a strategy used to provide a precise, constant level of lighting from a lighting system regardless of the age of the lamps or the maintenance of the luminaires.
LUMINAIRE is a complete lighting unit consisting of a light source such as a lamp or lamps, together with the parts that distribute the light, position and protect the light source and connect it to the power supply.
LUMINANCE is the luminous intensity of the source or surface divided by the area of the source or surface seen by the observer.
LUMINOUS EFFICACY is a measure of the luminous efficiency of a light source. It is the quotient of the total luminous flux emitted by the total light source power input, expressed in lm/W.
LUMINOUS FLUX is visually evaluated radiant flux and defines “light” for purposes of lighting design and illuminating engineering.
MARQUEE LIGHTING is a permanent lighting system consisting of one or more rows of many small lamps, including light emitting diodes (LEDs) lamps, tungsten lamps, low pressure discharge lamps or fiber optic lighting, attached to a canopy.
ORNAMENTAL LIGHTING for compliance with Part 6 is the following:
LUMINAIRES installed outdoor which are rated for 100 watts or less that are post-top luminaires, lanterns, pendant luminaires, chandeliers, and marquee lighting, not providing general lighting or task lighting.
DECORATIVE LUMINAIRES installed indoor that are chandeliers, sconces, lanterns, neon and cold cathode, light emitting diodes, theatrical projectors, moving lights, and light color panels, not providing general lighting or task lighting.
PENDANT (SUSPENDED) – A luminaire that is hung from a ceiling by supports.
PERMANENTLY INSTALLED LIGHTING consists of luminaires that are affixed to land, within the meaning of Civil Code Section 658 and 660, except as provided below. Permanently installed luminaires may be mounted inside or outside of a building or site. Permanently installed luminaires may have either plug-in or hardwired connections for electric power. Examples include track and flexible lighting systems; lighting attached to walls, ceilings, columns, inside or outside of permanently installed cabinets, internally illuminated
Permanently installed lighting does not include portable lighting or lighting that is installed by the manufacturer in exhaust hoods for cooking equipment, refrigerated cases, food preparation equipment, and scientific and industrial equipment.
PORTABLE LIGHTING is lighting, with plug-in connections for electric power, that is: table and freestanding floor lamps; attached to modular furniture; workstation task luminaires; luminaires attached to workstation panels; attached to movable displays; or attached to other personal property.
POST TOP LUMINAIRE is an outdoor luminaire that is mounted directly on top of a lamp-post.
PRECISION LIGHTING is task lighting for commercial or industrial work that illuminates low contrast, finely detailed, or fast moving objects.
RADIANT POWER is the time-rate-flow of radiant energy.
RADIANT ENERGY is energy travelling in the form of electromagnetic waves. It is measured in units of energy such as joules or kilowatt hours.
RECESSED LUMINAIRE is a luminaire that is mounted in the ceiling or behind a wall or other surface with the opening of the luminaire flush with the surface.
SCONCE is a wall mounted decorative accent luminaire.
SOURCE (LIGHT) is the general term used to reference a source of light. It can refer variously to an electric lamp, a light emitting diode (LED), an entire luminaire with lamp and optical control, or fenestration for daylighting.
SPECIAL EFFECTS LIGHTING is lighting installed to give off luminance instead of providing illuminance, which does not serve as general, task, or display lighting.
TASK LIGHTING is lighting that is not general lighting and that specifically illuminates a location where a task is performed.
TEMPORARY LIGHTING is a lighting installation, with plug-in connections, that does not persist beyond 60 consecutive days or more than 120 days per year
TRACK LIGHTING is a system that includes luminaires and a track, rails, or cables that both mount the system, and deliver electric power. Track lighting includes the following types:
LINE-VOLTAGE TRACK LIGHTING is equipped with luminaires that, use line-voltage lamps or that are equipped with integral transformers at each luminaire.
LOW-VOLTAGE TRACK LIGHTING is equipped with remote transformers for use with low-voltage equipment along the entire length of track.
TRACK LIGHTING INTEGRAL CURRENT LIMITER consists of a current limiter integral to the end feed housing of a manufactured line-voltage track lighting system.
TRACK LIGHTING SUPPLEMENTARY OVERCURRENT PROTECTION PANEL is a panelboard containing Supplementary Overcurrent Protection Devices as defined in Article 100 of the California Electrical Code, and used only with line voltage track lighting.
TRACK MOUNTED LUMINAIRES are luminaires designed to be attached at any point along a track lighting system. Track mounted luminaires may be line-voltage or low-voltage.
TUNING is the ability to set maximum light levels at a lower level than full lighting power.
LIGHTING CONTROLS consist of the following:
ASTRONOMICAL TIME-SWITCH CONTROL is an Automatic Time-Switch Control that controls lighting based on the time of day and astronomical events such as sunset and sunrise, accounting for geographic location and calendar date.
AUTOMATIC DAYLIGHT CONTROL uses one or more photosensors to detect changes in daylight illumination and then automatically adjusts the luminous flux of the electric lighting system in response.
AUTOMATIC MULTI-LEVEL DAYLIGHT CONTROL adjusts the luminous flux of the electric lighting system in either a series of steps or by continuous dimming in response to available daylight. This kind of control uses one or more photosensors to detect changes in daylight illumination and then automatically adjusts the electric lighting levels in response.
AUTOMATIC SCHEDULING CONTROL is a time-based lighting control device or system that is capable of being programmed to turn off outdoor luminaire power for a portion of the night and the day.
AUTOMATIC TIME SWITCH CONTROL controls lighting based on the time of day.
CAPTIVE-KEY OVERRIDE is a type of lighting control in which the key that activates the override cannot be released when the lights are in the on position.
COUNTDOWN TIMER SWITCH turns lighting or other loads ON when activated using one or more selectable count-down time periods and then automatically turns lighting or other loads OFF when the selected time period had elapsed.
DIMMER varies the luminous flux of the electric lighting system by changing the power delivered to that lighting system.
DIMMER, FULL-RANGE, or Continuous Dimmer, means a dimmer that varies the luminous flux of the electric lighting system over a continuous range from the device’s maximum light output to the device’s minimum light output without visually apparent abrupt changes in light level between the various steps.
DIMMER, STEPPED varies the luminous flux of the electric lighting system in one or more predetermined discrete steps between maximum light output and OFF with changes in light level between adjacent steps being visually apparent.