Lighting (Building) Properties

Contains controls used to define exterior lighting data for use in prescriptive calculations and energy simulation for the project building. Lighting data defined here specifies the exterior lighting for the project building. It is associated to the building in the OpenBuildings Energy Simulator Project Tree using the Component: Lighting tree object hierarchically organized under the Building tree object. Consequently, the Building tree object’s pop-up menu is the only place where the lighting component for exterior building lights can be accessed.

The Properties For: Lighting (Building) dialog opens when the Component: Lighting (Building) Project Tree object’s pop-up menu is activated in the OpenBuildings Energy Simulator Project Tree and the Properties menu item is selected.

Property heading	Properties
Area type	Used to select the type of external building area to be illuminated. The types drop-down list is populated with all the different types of building areas. Select one and press New.
New	Press to create new exterior lighting sub-components for the building. Each of these lighting sub-components’ characteristics can then be defined independently. (New) lighting area — When the New icon is pressed, a default properties panel opens with options for defining the new luminaire. Delete icon — Used to delete the building lighting sub-component.
Name	Used to enter a name for the luminaire. Once entered, the name appears in the property separator bar. Minimize the bar when you are not manipulating the luminaire characteristics.
Area	Used to enter an area value the new building lighting type is to illuminate. The Area field is used for lighting designed to illuminate areas, and is disabled for area types which require lighting that illuminates based on a linear distance that is illuminated. They use the Length property to define their illumination pattern.
Length	The Length field is used for lighting whose design is based on a linear distance that is to be illuminated, and is disabled for area types which require lighting that is designed to illuminate areas. They use the Area property to define their illumination pattern.
Category	Used to select the luminaire type from these available luminaire categories: Linear fluorescent — A gas discharge lamp that uses electricity to excite mercury vapor. The excited mercury atoms produce short wave ultraviolet light that causes a phosphor to fluoresce, producing visible light. A linear fluorescent lamp converts electrical power into useful light more efficiently than an incandescent lamp. The linear fluorescent lamp fixture requires a ballast to regulate the current through the lamp. Compact fluorescent — A fluorescent lamp of a small compact shape, with a single base that provides the entire mechanical support function. Compact fluorescent sources are three to four times more efficient than the traditional incandescent lamps they are designed to replace. To achieve credit towards compliance, the compact fluorescent lamp fixture must have a permanently installed ballast. HID - High Pressure Sodium — An electric discharge lamp in which light is produced when an electric arc is discharged through high pressure vaporized sodium. It may also have a phosphor coating that contributes to the light produced or enhances the light color. HID - Low Pressure Sodium — An electric discharge lamp in which light is produced when an electric arc is discharged through low pressure vaporized sodium. It may also have a phosphor coating that contributes to the light produced or enhances the light color. HID - Metal Halide — An electric discharge lamp which produces high light output in a small size, making it a compact, powerful, and efficient light source. HID metal halide lamps operate under high pressure and temperature, and require special fixtures to operate safely. HID - Ceramic Metal Halide — An electric discharge lamp in which the discharge is contained in a ceramic tube. Ceramic metal halide lamps use one fifth of the power of comparable incandescent bulbs for the same light output, and retain color stability better than most other gas discharge lamps. Incandescent — A lamp in which light is produced by a filament heated to incandescence by an electric current. Incandescent lamps are three to four times less efficient than compact fluorescent lamps. Halogen — Also known as a tungsten halogen lamp, is an incandescent lamp with a tungsten filament contained within an inert gas and a small amount of a halogen such as iodine or bromine. The combination of the halogen gas and the tungsten filament produces a chemical reaction known as a halogen cycle which increases the lifetime of the filament and prevents darkening of the bulb by redepositing tungsten from the inside of the bulb back onto the filament. A halogen lamp can be operated at a higher temperature than a standard gas-filled lamp of similar power and operating life.
Lamp	Used to select lamps to be used for the selected luminaire fixture (Category). Lamps are determined by the chosen luminaire category, ensuring the right type of lamp is selected: For linear fluorescent — Length , type and wattage are listed. For compact fluorescent — Twin tube, triple 4–pin, quad 2–pin, BIAX, spiral, reflector types and wattage are listed. For HID categories — Wattage from 18W to 1000W are listed. For incandescent — Wattage from 20W to 1000W are listed. For halogen — Halogen and Halogen MR types and wattage are listed.
Ballast	Used to select the ballast type to be used for the selected luminaire fixture (Category). A ballast is a device used in conjunction with an electric discharge lamp to cause the lamp to start and operate under the proper circuit conditions of voltage, current, wave form, electrode heat, etc. Ballast choices are determined by the chosen luminaire category. They are: Standard — Also known as an electronic ballast, constructed using electronic circuitry. Metallic — Constructed with magnetic core and a winding of insulated wire.
End usage category	Allows you to specify a user-defined end-use subcategory, for instance, "Lighting Conditioned", "Lighting Unconditioned", etc. for the lighting component used in the building. A new meter for reporting is created for each unique subcategory. Subcategories are also reported in the ABUPS table. If this field is omitted or blank, the lights will be assigned to the General end-use subcategory.
Lamps per fixture	Used to enter the number of lamps to be used per fixture of the chosen luminaire category.
Number of fixtures	Used to enter the number of fixtures of the chosen luminaire category to be considered as belonging to the active luminaire lighting sub-component.
Fixture wattage	Used to enter the total fixture wattage.
Exemption	Used to select an exemption from lighting power allowance requirements for the luminaire. Although, most lighting power is subject to the requirements of the ASHRAE 90.1 standard, some lighting for specialized commercial and display purposes, such as outdoor manufacturing, retail display windows, televised sports lighting, theatrical productions, and lighting integral to medical equipment, is exempt. Also exempt are certain lighting systems or portions of systems required for emergency use.
Schedule	Used to select a default lighting schedule for the lighting component used in the building.