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ASTRON 8X53 GPS SOLAR          
TO PRESERVE THE QUALITY OF YOUR WATCH
CONTENTS
6
Lumibrite
Condition Illumination
Sunlight
Fine weather 100,000 lux
Cloudy weather 10,000 lux
Indoor (Window-side
during daytime)
Fine weather more than 3,000 lux
Cloudy weather 1,000 to 3,000 lux
Rainy weather less than 1,000 lux
Lighting apparatus
(Distance from 40-watt
daylight fluorescent
light)
1 m 1,000 lux
3 m 500 lux (average room luminance)
4 m 250 lux
If your watch has Lumibrite
Lumibrite is a luminous paint that is completely harmless to human beings and natural environment, containing no
noxious materials such as radioactive substance. Lumibrite is a newly-developed luminous paint that absorbs the light
energy of the sunlight and lighting apparatus in a short time and stores it to emit light in the dark. For example, if
exposed to a light of more than 500 lux for approximately 10 minutes, Lumibrite can emit light for 3 to 5 hours.
Please note, however, that, as Lumibrite emits the light it stores, the luminance level of the light decreases gradually
over time. The duration of the emitted light may also differ slightly depending on such factors as the brightness of the
place where the watch is exposed to light and the distance from the light source to the watch.
In general, when you enter a dark place from a bright environment, your eye cannot adapt to the change in light levels quickly. At first, you can hardly see anything,
but as time passes, your vision gradually improves. (Dark adaptation of the human eye)
<
Reference data on the luminance
>
40


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