A meeting hall in an organization is to be provided with a lighting installation. The hall is 30 m × 20 m × 8 m (high). The mounting height is 5 m and the required level of illumination is 144 lm/m2. Design a lighting system for the hall with the given data. Lumens/watt for 200-W lamp = 12 and Lumens/ watt for 500-W lamp = 16. Utilization coefficient = 0.6 Maintenance factor = 0.75 space/height ratio=1 Using metal filament lamps, estimate the following: Flux Luman output per 200 W lamp Luman output per 500 W lamp

A meeting hall in an organization is to be provided with a lighting installation. The hall is 30 m × 20 m × 8 m (high). The mounting height is 5 m and the required level of illumination is 144 lm/m2. Design a lighting system for the hall with the given data. Lumens/watt for 200-W lamp = 12 and Lumens/ watt for 500-W lamp = 16. Utilization coefficient = 0.6 Maintenance factor = 0.75 space/height ratio=1 Using metal filament lamps, estimate the following: Flux Luman output per 200 W lamp Luman output per 500 W lamp

Delmar's Standard Textbook Of Electricity

7th Edition

ISBN:9781337900348

Author:Stephen L. Herman

Publisher:Stephen L. Herman

Chapter18: Resistive-inductive Parallel Circuits

Section: Chapter Questions

Problem 10PP: In an R-L parallel circuit, ET=240 volts, R=560, and XL=330. Find apparent power.

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A meeting hall in an organization is to be provided with a lighting installation. The hall is 30 m × 20 m × 8 m (high). The mounting height is 5 m and the required level of illumination is 144 lm/m2. Design a lighting system for the hall with the given data. Lumens/watt for 200-W lamp = 12 and Lumens/ watt for 500-W lamp = 16. Utilization coefficient = 0.6 Maintenance factor = 0.75 space/height ratio=1 Using metal filament lamps, estimate the following: Draw the spacing layout of these lamps State the reason if any of these 2 lamps cannot be arranged in the hall with the given specification. What is the significance of ‘room surface maintenance factor’ and ‘utilization factor’ in the lighting design
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