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00 | Honeybee


01 \| Daylight \| Material


02 \| Daylight \| Light Source


03 \| Daylight \| Recipes

04 | Daylight | Daylight


05 \| Energy \| Building Program


06 \| Energy \| Material \| Construction


07 \| Energy \| Schedule


08 \| Energy \| Set Zone Properties


09 \| Energy \| HVACSystems

10 | Energy | Energy


11 \| THERM

12 | Developers


13 \| WIP

Lighting Density Calculator

Use this component to calculate the Lighting Density Per Area Load from information about your bulb, fixture type, mainteneance, and required lighting level.
Plug the result to the Honeybee setEPZoneLoads component, lightingDensityPerArea_ input

Inputs

Name	ID	Description	Type
Light Level	_lightLevel	A number representing the required light level in the room in lux. For instance, 500 lux for a typical office area or 300 lux for a typical residential space. Note that a lux value input here means that light level is reached everywhere on the room floor plan.	Goo
Luminous Efficacy	luminousEfficacy_	A value between 0 and 100 that represents how well a light source produces visible light in lumens/Watt. More specifically, it is the ratio of luminous flux (in Lumens) coming from a buld to electrical power (in Watts) going into the bulb. Here are some common options: 92 = Fluorescent (T5 tube) 81 = 8.7 W LED screw base lamp (120 V) 80 = Fluorescent (T8 tube) 52 = Compact Flourescent 13.8 = Incandescent 0.3 = Candle The default is set to 80 lm/W for Fluorescent (T8), which is also close to LED lamps. Sources - http://en.wikipedia.org/wiki/Luminous_efficacy, http://sustainabilityworkshop.autodesk.com/buildings/electric-light-sources	Goo
Maintenance Factor	maintenanceFactor_	A number between 0 and 1 that represents how often the lights are cleaned and replaced (higher numbers mean more often). It takes into account such factors as decreased efficiency with age, accumulation of dust within the fitting itself and the depreciation of reflectance as walls and reflecting surfaces age. For convenience, it is usually given as three options: 0.70 = Good 0.65 = Medium 0.55 = Poor The default is set to 0.65 for Medium. Source - http://sustainabilityworkshop.autodesk.com/buildings/light-fixtures-and-layout	Goo
Coefficient Of Utilization	coefficientOfUtilization_	A number between 0 and 1 that represents the fraction of the lumens from the bulb that finally find their way to the work plane (higher values indicate a more efficient fixture). This number depends on the particular fixture type, the number of lamps in it, the lens used, its beam pattern, the shape of the room (Room Cavity Ratio, RCR) and the reflectances of the ceiling (Rc), walls (Rw) and floor (Rf). Here are some common Examples: 0.84 = Basic Fluorescent Strip 0.72 = Deep-Cell Parabolic Louver 0.55 = Small-Cell Parabolic Louver The default is set to 0.84 for a Basic Fluorescent Strip Source - http://www.gelighting.com/LightingWeb/na/resources/tools/epact-estimator/popup-cu-ratings.jsp	Goo

Outputs

Name	ID	Description	Type
Out	out	The execution information, as output and error streams	String
Lighting Density Per Area	lightingDensityPerArea	(W/m2)The lighting load per square meter of floor, which can be plugged into the "Set EnergyPlus Loads" component.	Goo