A 30 ft by 40 ft classroom with 8 ft high ceilings will have an ambient lighting target illuminance of 70 fc at a work plane that is 28 in above the floor. It is anticipated that the ceiling reflectance is 0.50 and the average wall reflectance is about 0.3. The space will be illuminated with surface- mounted, prismatic wraparound luminaires with four lamps, as shown in Figure 20.16. The initial output of the fluorescent lamps is 2,850 lumen. The light loss factor will be assumed to be 0.70. Neglecting the spacing criteria, determine the minimum number of luminaires required to provide uniform illumination in the space. (Type in the number only)
A 30 ft by 40 ft classroom with 8 ft high ceilings will have an ambient lighting target illuminance of 70 fc at a work plane that is 28 in above the floor. It is anticipated that the ceiling reflectance is 0.50 and the average wall reflectance is about 0.3. The space will be illuminated with surface- mounted, prismatic wraparound luminaires with four lamps, as shown in Figure 20.16. The initial output of the fluorescent lamps is 2,850 lumen. The light loss factor will be assumed to be 0.70. Neglecting the spacing criteria, determine the minimum number of luminaires required to provide uniform illumination in the space. (Type in the number only)
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
Related questions
Question
Please show complete answer with a complete formula
Transcribed Image Text:A 30 ft by 40 ft classroom with 8 ft high ceilings will have an ambient
lighting target illuminance of 70 fc at a work plane that is 28 in above the
floor. It is anticipated that the ceiling reflectance is 0.50 and the average
wall reflectance is about 0.3. The space will be illuminated with surface-
mounted, prismatic wraparound luminaires with four lamps, as shown in
Figure 20.16. The initial output of the fluorescent lamps is 2,850 lumen. The
light loss factor will be assumed to be 0.70. Neglecting the spacing
criteria, determine the minimum number of luminaires required to provide
uniform illumination in the space. (Type in the number only)
Expert Solution
This question has been solved!
Explore an expertly crafted, step-by-step solution for a thorough understanding of key concepts.
This is a popular solution!
Trending now
This is a popular solution!
Step by step
Solved in 2 steps with 2 images
Knowledge Booster
Learn more about
Need a deep-dive on the concept behind this application? Look no further. Learn more about this topic, civil-engineering and related others by exploring similar questions and additional content below.Recommended textbooks for you
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Structural Analysis (10th Edition)
Civil Engineering
ISBN:
9780134610672
Author:
Russell C. Hibbeler
Publisher:
PEARSON
Principles of Foundation Engineering (MindTap Cou…
Civil Engineering
ISBN:
9781337705028
Author:
Braja M. Das, Nagaratnam Sivakugan
Publisher:
Cengage Learning
Fundamentals of Structural Analysis
Civil Engineering
ISBN:
9780073398006
Author:
Kenneth M. Leet Emeritus, Chia-Ming Uang, Joel Lanning
Publisher:
McGraw-Hill Education
Traffic and Highway Engineering
Civil Engineering
ISBN:
9781305156241
Author:
Garber, Nicholas J.
Publisher:
Cengage Learning