A controlled light fixture mounted on a 5-meter pole can illuminate an area 30 meter in diameter.
For security lighting purposes, what would be the proper distance between fixtures?
A.
25 meters
B.
30 meters
C.
35 meters
D.
40 meters
Explanation:
The answer should be 25 meters: If a lamp provides a 30 foot illumination, the lamps should be
placed less than 30 feet apart to provide an overlap. A 30 meter coverage area mean the next light
should be less than 30 meters away, and the only answer that fits is 25 meters. Chapter 6, page 459
of Shon Harris CISSP 5th edition book.