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Factorscan causelumen depreciation
This lets less light throughcausinglumen depreciation
The evaporated materials ... the inside of the reflector or lensmay resultin lumen depreciation of the lamp
evaporation and scattering of electrode material ( lamp blackening(passive) is caused byLamp - Lumen Depreciation Lamp - lumen depreciation
heat generated at the LED junction(passive) primarily caused bylumen depreciation
a single timecausinglumen depreciation
chemical degradation of the phosphor materialcauseslumen depreciation
addition of shatter protection which is the case with the fluorescent tubes(passive) caused bylumen depreciation
substances , even inadvertent substancescould causelumen depreciation
the LED to output light having an unacceptably low level of lumenscausingthe LED to output light having an unacceptably low level of lumens
lights to appear dimmer over timecauseslights to appear dimmer over time
this 4256 lumen output value to decline over timewill causethis 4256 lumen output value to decline over time
light output to decrease quickly after initial installationcauseslight output to decrease quickly after initial installation
a period oftime(passive) caused bya period oftime
from dirt laying on the lens , lamp , reflector , or all threeresultsfrom dirt laying on the lens , lamp , reflector , or all three
in under - lit areas on the road with other street light technologiesresultsin under - lit areas on the road with other street light technologies
lamp no ballast led lamp typesledlamp no ballast led lamp types
in shortened useful liferesultingin shortened useful life
out in LM-80setout in LM-80