Discussion
Total flux required in any lighting scheme depends inversely upon:
Answer: C
The total flux depends inversely on the utilization factor.
In the lumen method, the total lamp flux needed to give an illumination E over an area A is
\[ \Phi = \frac{E \times A}{UF \times MF} \]
where UF is the utilization factor (the fraction of lamp flux that reaches the working plane) and MF the maintenance factor. A higher utilization factor means fewer lumens are needed, so the flux is inversely proportional to it.
Illumination and surface area are in the numerator, so the flux is directly proportional to both. The space to height ratio affects the layout of the fittings and the uniformity of lighting, not the flux formula itself.
Post your comment
Please log in or register to post a comment.
Examination Categories
- SSC Exams
- Banking Exams
- Teaching Exams
- Civil Services Exams
- Railways Exams
- Engineering Recruitment Exams
- Defence Exams
- State Government Exams
- Police Exams
- Insurance Exams
- Nursing Exams
- Other Government Exams
- NRA CET
- PG Entrance Exams
- Campus Placement
- MBA Entrance Exams
- CUET and UG Entrance
- Judiciary Exams
- Regulatory Body Exams
- Software Development