Cost Comparison between 10 sets
of Electrical Exit light and 10 sets of Self Luminous Exit Sign over
a 10 year period* 
Type 
8 W exit light 
Self Powered Exit Sign 
Cost of 10 sets 
S$750.00 
S$3500.00 
Installation Cost for
10 sets 
S$2000.00
(with wiring) 
S$300.00
(no wiring) 
Power Consumption 
13W X 10
sets 
0 
Power Consumption per
year 
1,138 KW 
0 
Power Consumption per
10 years 
11,380
KW 
0 
Electricity Cost 
25
cents/KWH 
0 
Electricity Cost for 10
years 
S$2845.00 
0 
Total operating cost
for 10 years 
S$5,595.00 
S$3,800.00 
*Did not
take into consideration the following
1)The life span of the exit light which is about 5 years
2) The lamp life which is about 5,000 hours
3)Maintenance and replacement cost for the above

