The following diagram shows that the light intensity gradually decreases as the viewing angle is increased. Use this information to determine the best location for the strobe light.

 

LIGHT

 

 

 

 

90°

90°

SOURCE

90°

PERCENT

ANGLE

 

CEILING

 

45°

 

 

 

(LIGHT INTENSITY)

(IN DEGREES)

 

 

 

 

100

0

 

 

 

 

 

90

5-25

 

 

 

45°

45°

75

30-45

 

 

 

55

50

0°

LIGHT

 

 

 

45

55

 

0°

 

40

60

 

SOURCE

 

 

35

65

 

WALL

 

 

 

35

70

 

 

 

 

 

30

75

 

 

 

 

 

30

80

 

45°

 

 

 

25

85

 

 

 

 

25

90

 

90°

 

 

 

 

 

 

2. APPLICATIONS

PRIMARY DIRECT AND INDIRECT VISIBLE SIGNAL

Locate the strobe light on the ceiling in the center of the room or on the wall a minimum of 80"(2 m) above the floor.

For rooms larger than 250 sq. ft. (14 ft. by 16 ft. - 4.27m by 4.88 m) the notification device should be located within 16 ft. (4.88m) of the pillow.

SUPPLEMENTARY VISIBLE SIGNAL

The strobe may be located less than 80" (2 m) above the floor.

3. RECOMMENDED LOCATIONS OF VISUAL SIGNALING DEVICES

•Locate the first strobe light in the bedroom in which the hearing impaired individual sleeps. If the bedroom door is kept closed at night, an interconnect- ing smoke detector must also be installed in that bedroom.

•Locate additional strobe lights in any lived-in room where a hearing impaired individual would need to be notified of an alarm condition.

4. LOCATIONS TO AVOID

•In direct sunlight or high ambient light areas; the bright light may reduce ones ability to notice the strobe light.

•In areas where the temperature may fall below 32˚F (4.4˚C) or rise above 100˚F (37.8˚C).

•In areas with high humidity.