Podcast
Questions and Answers
What is the formula for calculating luminance?
What is the formula for calculating luminance?
- Lumens x Reflectance factor
- Area x Footlamber
- Lumens/sq.ft x Reflectance factor (correct)
- Footcandle x Area
In lighting units, what does Lux measure?
In lighting units, what does Lux measure?
- Light Flux (Lumens)
- Area (m²)
- Lumens flux
- Illumination (correct)
What is the illumination level recommended for work stations and offices other than desk areas?
What is the illumination level recommended for work stations and offices other than desk areas?
- 16 footcandles
- 30 footcandles (correct)
- 50 footcandles
- 10 footcandles
Which unit is more conveniently used when measuring luminance?
Which unit is more conveniently used when measuring luminance?
What does a Lambert measure in terms of luminance?
What does a Lambert measure in terms of luminance?
What is the primary source of illumination in a fluorescent lamp?
What is the primary source of illumination in a fluorescent lamp?
What is the correct formula to calculate illumination on the floor?
What is the correct formula to calculate illumination on the floor?
Which type of fluorescent lamp is known for its long life span?
Which type of fluorescent lamp is known for its long life span?
What is the measure of how efficiently a light source produces visible light?
What is the measure of how efficiently a light source produces visible light?
Which type of fluorescent lamp uses a mercury lamp with a phosphor coating?
Which type of fluorescent lamp uses a mercury lamp with a phosphor coating?
What is the factor that indicates the efficiency of a fixture-room combination?
What is the factor that indicates the efficiency of a fixture-room combination?
Which type of fluorescent lamp has the highest efficacy?
Which type of fluorescent lamp has the highest efficacy?
What is the primary difference between efficacy and efficiency in terms of a fluorescent lamp?
What is the primary difference between efficacy and efficiency in terms of a fluorescent lamp?
Which type of fluorescent lamp is designed to eliminate the delay inherent in preheat circuits by constantly keeping the cathodes energized?
Which type of fluorescent lamp is designed to eliminate the delay inherent in preheat circuits by constantly keeping the cathodes energized?
Why does the continuous burning of a fluorescent lamp result in a longer lifespan compared to frequent switching on and off?
Why does the continuous burning of a fluorescent lamp result in a longer lifespan compared to frequent switching on and off?
Which type of fluorescent lamp has only one pin at each end acting as a switch to break the ballast circuit when the tube is removed?
Which type of fluorescent lamp has only one pin at each end acting as a switch to break the ballast circuit when the tube is removed?
What component of a fluorescent lamp tends to be worn out with frequent switching on and off?
What component of a fluorescent lamp tends to be worn out with frequent switching on and off?
Why does about 80% of the input energy in a fluorescent lamp get converted into heat?
Why does about 80% of the input energy in a fluorescent lamp get converted into heat?
