A 20 ft by 20 ft multi-purpose conference room has a 14 ft ceiling height and desktops at 30 inchesAFF. The lighting system uses recessed downlight luminaires in a configuration of 3 rows, with 4luminaires in each row. The room reflectance values are approximated as 80/50/20 for theceiling, walls, and floor respectively. Technical information for the luminaires is shown below, andfrom that you have determined that each luminaire has 2342 lumens. What is the averageilluminance produced by the lighting system in the multi-purpose room? Show your work andkeep track of units as you set up and solve the equations. Specifically, show the values of the RCRand CU as part of your work. DownlightingCalculite LED 7" gen 3C7RDL Round DownlightMedium beam (0.9 s.c.), 2500lm Engine, 110.0 lm/w or 109.4 lm/W at 21 4W (Power over Ethernet)Candela Curve3.000LIGHTOLIERby ⒸignifyTHE C7RN & 7RNEngie CGL258 35WZ1QUTirn C/ROLNMCLOutput lumens 2342 ImsStarodoSpacing cmtPRIMARIOHET1 Correlated color temper2. Teated using Josuluk proZonal summaryZone Lumens LuminaireAngle Mean CP Lumenso_222827948338248.8MA---6-6Single unit dataHeight to Initial center beamlighted planein train79Multiple unit data - RCR 2encenterANCSInitial center bomfoot candles19Beam diameter is where foot-candlesdrop to 50% of maximumteamdiameter (1)4554BrDer so IL04401738 7 34 × 10¹ Room Workpland, 5above floor. 80/50/204 RefectancesEfficacy 115 2 Im/wAdjustment factors.FinishLEWHoney quesUC,100%Coefficients of utilizationCeilingWalDBOCRI 1000K - 107%BOCHI 3500K = 100%BOCRI 3000K - 99%BOCRI 2700K. 93%SOCRI 3000K - 8790CRI 7700K10 5010 50 100Zonal cavity method - Effective floor reflectance: 20%119 119 119 119 116 116 111 m 106 106 100114 111 109 107 109 105 105 102109 101 100 97 102 96 99 94101 97 91 89 96 8838 28 06 20 90 16 8662822F1Z72 66 63 72 42Lumens6000lm 21014800lm3500lm 14012500m 100%2000m - 8BOX1500lm - 60%1000m 40%78 62 63 59 6893 8794 80 80 75 85 76 83 7589 81 7538682K29055(835R$1877specs as defined in ANSI NIUMA, ANSLG Cra 372-2008 Specifications for the Chromaticity of Solid State Lighting productsThed in LM79 IESNA Approved Method for the Electrical and Photometric Meisurements of Sond. State Lighting Products:

Dimension of the room is 20 ft by 20 ft.The ceiling height is 14 ft and desktops at 30 inches…

A 20 ft by 20 ft multi-purpose conference room has a 14 ft ceiling height and desktops at 30 inches AFF. The lighting system uses recessed downlight luminaires in a configuration of 3 rows, with 4 luminaires in each row. The room reflectance values are approximated as 80/50/20 for the ceiling, walls, and floor respectively. Technical information for the luminaires is shown below, and from that you have determined that each luminaire has 2342 lumens. What is the average illuminance produced by the lighting system in the multi-purpose room? Show your work and keep track of units as you set up and solve the equations. Specifically, show the values of the RCR and CU as part of your work.

A 20 ft by 20 ft multi-purpose conference room has a 14 ft ceiling height and desktops at 30 inches AFF. The lighting system uses recessed downlight luminaires in a configuration of 3 rows, with 4 luminaires in each row. The room reflectance values are approximated as 80/50/20 for the ceiling, walls, and floor respectively. Technical information for the luminaires is shown below, and from that you have determined that each luminaire has 2342 lumens. What is the average illuminance produced by the lighting system in the multi-purpose room? Show your work and keep track of units as you set up and solve the equations. Specifically, show the values of the RCR and CU as part of your work.

EBK ELECTRICAL WIRING RESIDENTIAL

19th Edition

ISBN:9781337516549

Author:Simmons

Publisher:Simmons

Chapter10: Lighting Branch Circuit—bathrooms, Hallway

Section: Chapter Questions

Problem 9R: Hanging luminaires must be kept at least _______________ ft (_______________ m) from the edge of the...

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