Page 301 - The ROV Manual - A User Guide for Remotely Operated Vehicles 2nd edition
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11.2.1.2 Quality
From the visible spectrum described in Figure 11.1, one can see that visible light is made up of many differing colors depending upon its wavelength. In a symphony of sound, the total orchestral score is experienced by the mixture of all sounds reaching the ear. It is the same for color
55 lux at 1 m
Wide beam
200 lumens
325 lux at 1 m
Narrow beam
200 lumens
Parabolic reflector
11.2 Vehicle lighting 291
FIGURE 11.2
Lumens to lux.
One meter
Two meters
Three meters
1m
FIGURE 11.3
200 lumens output
325 lux at 1 m
81 lux at 2 m
36 lux at 3 m
Spreading losses per unit distance.
