A 40 watts x 120 cm long fluorescent lamp produces 3200 lumens of light in a dining room of 10 ft x 20 ft. Compute the illumination on the floor comparing the English and Metric units.

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Solve the Following Problems

1. A 40 watts x 120 cm long fluorescent lamp produces 3200 lumens of light in a
dining room of 10 ft x 20 ft. Compute the illumination on the floor comparing the
English and Metric units.
2. The candle power of a source is 200 candela in all direction below the lamp. The
mounting height of the lamp is 6m. Find the illumination
a. Just below the lamp
b.
3 m horizontally away from the lamp on the ground
The total luminous flux in an area of 1.5m diameter around the lamp on the
ground
3. An 8m x 20m room is to be lighted at an average maintained of 50fc. How many
lamp lumens are required assuming 0.38 cu and 0.75 mf?
4. A warehouse will install incandescent lamps at a mounting height ratio of 1.5m.
The lamp will be mounted on a grid measuring 5 m x 5 m. What is the minimum
mounting height of the lamps?
5. Explain how the three point lighting being used in the pictures.
А.
В.
Transcribed Image Text:1. A 40 watts x 120 cm long fluorescent lamp produces 3200 lumens of light in a dining room of 10 ft x 20 ft. Compute the illumination on the floor comparing the English and Metric units. 2. The candle power of a source is 200 candela in all direction below the lamp. The mounting height of the lamp is 6m. Find the illumination a. Just below the lamp b. 3 m horizontally away from the lamp on the ground The total luminous flux in an area of 1.5m diameter around the lamp on the ground 3. An 8m x 20m room is to be lighted at an average maintained of 50fc. How many lamp lumens are required assuming 0.38 cu and 0.75 mf? 4. A warehouse will install incandescent lamps at a mounting height ratio of 1.5m. The lamp will be mounted on a grid measuring 5 m x 5 m. What is the minimum mounting height of the lamps? 5. Explain how the three point lighting being used in the pictures. А. В.
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