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Apollo-155
Long Range Lantern Adjustable from 4-12nm+
4.6 Intensity Selection
Using the Sealite Lantern Programmer, Sealite lanterns may be set to a standard light intensity to
meet installation requirements. The desired intensity range may be set in nautical miles (nm - with
dependence on listings of atmospheric transmissivity and background lighting conditions), candela
(cd) or direct pulse width modulation (PWM) (see image 5).
Atmospheric Transmissivity (AT) –
when a light beam passes through the atmosphere the atmospheric
transmissivity factor indicates how much light is absorbed by the atmosphere. For example, when AT =
0.85 this means that 85% of the original light intensity is visible after 1nm. Consequently 15% of light is
lost to atmospheric absorption.
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mage 5. Sealite Lantern Programmer “Intensity” tab – showing Intensity Selection (nm),
Intensity Selection (cd), Intensity Selection (PWM) & Effective Intensity Correction
