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.
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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