Lumibrite - Seiko Presage SSA457J Instruction Manual

If your watch has Lumibrite
2
Lumibrite is a luminous paint that absorbs the light energy of sunlight and lighting apparatuses 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 coming from a place that is bright to a place that is dark, it takes human eyes some time to adapt
to the darkness making it difficult to see objects initially. (Dark adaptation)
* Lumibrite is luminous paint that stores and emits light, which is harmless to human beings and the environment,
containing no toxic materials such as radioactive substances.
<Brightness levels>
Sunlight
Indoor (Window-side during
daytime)
Lighting apparatus (40-watt daylight
fluorescent light)
40
EN

Lumibrite

Condition
Fine weather
Cloudy weather
Fine weather
Cloudy weather
Rainy weather
Distance to the watch: 1 m
Distance to the watch: 3 m
Distance to the watch: 4 m
Illumination
100,000 lux
10,000 lux
More than 3,000 lux
1,000 to 3,000 lux
Less than 1,000 lux
1,000 lux
500 lux (Average room luminance)
250 lux