Which of the following are the advantages of mercury vapour lamp?
It generally has higher luminous efficacy than a conventional incandescent lamp
A conventional mercury-vapour lamp generally produces more lumens per watt than a conventional incandescent lamp. This was a practical advantage for industrial and outdoor lighting. Its line spectrum and limited colour rendering should not be equated with natural daylight; it also requires a warm-up period.
Important Questions from Illumination
Which of the following methods of lighting calculation can be used for rough calculations and checking purposes?
How many 200 linear lamps are required to obtain a minimum illuminance of 50 lux in a 5 m and 8 m rectangular hall?
Intensity of light is measured in:
The unit of luminous flux is:
The gas filled in vacuum filament lamps is:
