When it comes to lighting jargon, think lumens not watts. The descriptions for the terms, acronyms and nomenclature represent the meanings understood and shared by a majority of the lighting design community. A base up lamp must be inserted into a socket with the base of the lamp pointing up (vertical orientation). LPS lights have a very high efficacy, but their color rendering performance is very poor. A fill light is usually … A fixture that attaches to the ceiling canopy with a stem or part that creates a gap between the fixture and ceiling. Lamps that have two bases opposite one another. All HID lamps offer good energy efficiency and life. Halogen lamps also provide brighter, whiter light with better color characteristics, longer life and improved energy efficiency. A 12-digit code found in lighting products, which can be scanned at the point of sale. The IEEE is a technical authority that has published many standards and recommended practices for the electrical and electronic fields. A wall-mounted lighting fixture, which generally has a decorative purpose. Institute of Electrical and Electronics Engineers, a global professional association with over 400,000 members. A piece of glass or acrylic that has the purpose of scattering the light from a bulb, which results makes lighting more uniform and eliminates glare. Going from watts (W) to kilowatts (kW) is a pretty straightforward calculation: 1 kW is equal to 1,000 W. A way to measure how much energy is used over time. Unlike the CRI, which describes how faithfully a light source represents other objects, the correlated color temperature (CCT) describes the color output of the lamp itself. One foot-candle is equivalent to one lumen per square foot (See Illuminance). Additionally, it will give you a clearer picture of installation conditions, minimizing surprises when it’s time to install. A numeric code that describes the degree of protection offered by an enclosure, according to the NEMA 250-214 standard. A floor lamp that uses a reflector on top a pole to direct its entire output upward, which is then reflected from the ceiling and walls. Cove lighting is often used for decorative purposes because it can emphasize the borders of walls, as well as ceiling features. The luminous flux describes the total lighting output of a lighting fixture without considering direction. When a product is UL listed UL has recognized that it meets a standard set of safety requirements. For example, the following lumen maintenance life would describe a product whose output decreases to 70% after 60,000 hours of use: Lumens Per Watt (LPW) is the light output per unit of energy consumption and it reflects the lighting system's efficacy. NEMA 3R = Indoor or outdoor use, dirt protection, resistant to rain and snow. Bulb (Light Fixture) A glass vessel that produces light when an electric current passes through it. Manufacturers use 3 hours per start for fluorescent lamps and 10 hours per start for HID lamps when performing lamp life testing procedures. The CU is influenced by the luminous efficiency of the fixture, as well as room geometry and colors. The applications of uplighting are generally decorative. Typically, this causes a buzz or a hum. The drawback of instant-start ballasts is that they reduce the service life of lamps: electrode material is expelled each time the lamp is started, blackening its edges and causing eventual failure. In the BUG rating, these effects are indicated in a scale from 0 to 5, where 0 indicates the effect is minimized and 5 indicates it is not controlled at all. ADA Compliant Fixtures that adhere to the guidelines provided by the Americans with Disability Act, stating that a wall light … National Association of Innovative Lighting Distributors, a lighting industry association that provides ongoing training, a discussion forum, networking, business intelligence and information services. For example, if the pole lamps in a parking lot emit backlight towards adjacent homes or apartments, it can be bothersome for the property owners. A lighting maintenance plan designed to have a technician check lighting on a regular interval to check for outages or necessary repairs. The total lumens emitted and their spatial distribution are of paramount importance when creating appealing and luxurious indoor spaces. portalId: "455757", Acronym for low-pressure sodium, a subtype of HID lighting where excited sodium vapor is the source of light. Lighting where more than 90% of the light goes directly from the source to the area you wish to illuminate. Light reflected in a particular direction, or the photometric quantity most closely associated with brightness perception, measured in units of luminous intensity (candelas) per unit area (square feet or square meters). PAR lamps may be incandescent, halogen or HID types. Then, with a portion of the money you save on reduced energy bills, you budget a monthly payment for your lighting. CCFLs tend to be less efficient than conventional fluorescent lamps, but offer a service life of over 60,000 hours, comparable to that of LED lighting. Prescriptive lighting rebate programs are not designed to be claimed instantly. This term should not be confused with kilowatt-hour. Backlighting is a type of accent lighting, and is commonly used to draw attention to works of art. Lighting fixtures with lens or diffusers. Visual impairment caused by a bright source of light, directly visible or reflected by a surface. Custom lighting rebate programs offer incentives for projects which do not meet the requirements of the existing instant or prescriptive rebate programs. Tube lighting is often known as fluorescent lighting or linear lighting. luminaire efficiency – The ratio of luminous flux (lumens) emitted by a luminaire … Luminance is measured in candelas per square meter (cd/m2). They generally come with standard bases that fit into the sockets found in compatible fixtures. Smaller and lighter than magnetic transformers, electronic versions use electronic switching and special dimmers to step the line voltage down to the lamp voltage. A type of CFL lamp where two parallel fluorescent tubes share the same base. But in a modern home, the complex designs may not blend so well in a clean styled space. }); hbspt.forms.create({ Some of the application parameters they define are wattage, base type, envelope size, and light center length. A type of lighting fixture that offers superior energy efficiency, by using a specially-designed LED array and internal geometry. An opaque or translucent component that blocks direct sight of a lighting source. PLAY. Fluorescent light built into a soffit at the top corner of a wall (i.e., where the wall meets the ceiling). The dull yellow lighting of low-pressure sodium lamps is an example of monochromatic light. MR lamps are available with both screw bases and pin bases. Full-Cutoff Fixture: A light fixture designed to cast little or no upward light. BSC - Lighting Terminology. Shunted sockets feature internally connected electrical contacts. LED Lighting Terminology – Speaking the Industry Language LED lighting terminology and definitions can be confusing. Test. The housing is the actual light fixture. Integrated lighting fixtures are generally more efficient than lamp-based LED fixtures, but they make retrofits more expensive because the entire fixture must be replaced, not only the lamps and ballasts. Some lamps are specified or designed to be operated in certain positions, such as horizontal or base-up. The longer fluorescents burn, the more likely it is that the chemical properties will shift and cause an imbalanced reaction, making the fluorescence less white and less bright than it once was. Lighting fixture used to provide outdoor area lighting, where the lamp is found on top of a pole, often with a reflective housing that achieves a characteristic lighting pattern. Used to compare ballast efficiency. luminaire – A light fixture; the complete lighting unit, including a lamp, reflector ballast, socket, wiring, diffuser, and housing. Swivel. Lighting effect where a wall is illuminated so that surface irregularities are minimized, it seem smoother. Directed light normally causes glare when the sources is viewed directly. IESNA has members and recognition throughout the world. A measure of electrical potential expressed in volts. The sun, when covered with clouds that diffuse its light. A type of lighting that generally directs it output towards the ceiling, and where individual fixtures are hidden in ledges. Any serious student of lighting design will study the complete glossary of terminology found in many theatrical lighting … Measurement unit for illuminance, or lumens per unit of area. They have a lower wattage and emit less heat. formId: "57ebcd10-bfe2-43a8-a2f8-93068502c170" Cyclorama: a curved backdrop, sometimes made of cloth, used to create background scenery with color… The MR designation is followed by a numerical value indicating the lamp diameter in 1/8ths of an inch, where two of the most common types are MR11 and MR16. Voltage drives electric current through lighting fixtures and other appliances, just like pressure drives the flow of water in plumbing installations. }); hbspt.forms.create({ portalId: "455757", Leadership in Energy and Environmental Design, a resource efficiency certification framework for buildings, developed by the US Green Building Council. Lighting designed to provide visibility when the normal lighting system fails, for example during blackouts. Voltage is the force that pushes electrical current through a conductor. Learn more about lighting as a service here. Preheating is accomplished by applying a very low voltage that is high enough to raise the temperature of electrodes, but without causing the lamp to ignite. Flexible, dynamic and customizable, strip lights can be cut and stuck anywhere, according to project requirements. Lamps that function at a high voltage and offer naturally diffused or scattered light. Click here to learn more about UL listing. Lighting effect where a wall with an irregular surface is illuminated so that there are both highlighted and shaded areas. It has a reflective surface and its geometry is specially designed to provide a specific lighting distribution. The luminous flux on a surface, per unit of area. Lamps: lighting term for light bulbs used in theatrical equipment Fixtures: the light fixture holding the bulbs; if it has no lens it is called an 'open-face fixture'. A metric used to describe the time in which the output of a lighting product diminishes to a specific percentage of its initial value. portalId: "455757", This advancement in LED lighting essentially boosts the output of a certain spectrum of light. Dimmers can be used to make indoor environments more customizable and personal, and are also useful to save energy. 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