5 3.5 2.50
According CIE volume 97, “Maintenance indoor electric lighting systems”, 2005
In case you are not familiar with the appli
cation, the following standard
values apply; however, the tables below will help you calcu
late the accurate
maintenance factor according formula (2).5
Example:
Luminaire maintenance: every year
Room surface maintenance: every years
Lamp replacement: every years
Faulty lamp replacement: immediately
= Em
= Enew
years
Environmental conditions
.0 1.80
Clean (C) years Offices
Schools
0.
160%
140%
120%
100%
80%
60%
40%
20%
0 0.0 3.5 1.0 2.67
Normal (N) years Shops
Laboratories
Restaurants
Warehouses
Assembly bays
0.195
The Lighting Handbook
Ambient
condition
Maintenance interval
recommended
Working areas Reference main-
tenance factor
Very Clean (VC) years Cleanrooms, data centres,
assembly workstations for
electronic components
0.57
Soiled (S) year Steel works
Chemical plants
Foundries
Welding shops
Grinding shops
Wood processing
0
