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
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
Chapter25: Television, Telephone, And Low-voltage Signal Systems
Section25.2: Telephone System
Problem 2R: At what height are the telephone outlets in this residence mounted? Give measurement to center....
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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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