(redirected from Lamp Lumen Depreciation)
LLDDoctor of Laws
LLDLast Line of Defence (gaming clan)
LLDLamb Lies Down on Broadway (band Genesis album/tour)
LLDLearning Lab Denmark
LLDLeft Lateral Decubitus
LLDLipid-Lowering Drug
LLDLeg Length Discrepancy
LLDLower Limit of Detection
LLDLow Level Design
LLDLamp Lumen Depreciation (light loss measurement)
LLDLeadless Diode
LLDLanguage Learning Disability
LLDLower Level of Detection
LLDLiquor Licensing Division (Australia)
LLDLodge Leadership Development
LLDLower Limb Discrepancy (medical condition)
LLDLight Limited Duty (US Navy)
LLDLife Long Dream
LLDLegum Doctor (Latin: Doctor of Laws)
LLDLow-Level Dose
LLDLow-Loss Dielectric Material
LLDLow-Level Discriminator
LLDLarge Lot Division (zoning)
LLDLow Level Dueling (gaming)
LLDLearning-Language Disabilities (education)
LLDLupus-Like Disease
LLDLow Level Discrete (command type)
LLDLow Level Document
LLDLondon Landlords’ Day (UK)
LLDLabeled Let Down (skate team)
References in periodicals archive ?
Color shift may occur well before any failure point associated with lamp lumen depreciation.
Given that LED lamp life and lumen maintenance are inseparable, what lamp lumen depreciation (LLD) factor should be employed for LED lighting systems?
Maintained values are determined by applying multiplying factors that model the effects of lamp lumen depreciation and dirt depreciation to the initial values.
Participants will also learn how to avoid making poor lighting decisions by understanding the factors that go into lighting design calculations, including lumen maintenance, lamp lumen depreciation, luminaire dirt depreciation, ambient temperature effects and the pro-ration of IES files, to name a few.
Recoverable LLFs include lamp lumen depreciation, luminaire dirt depreciation, and lamp burnout.
Lamp lumen depreciation (LLD) was expected to be a major contributor to total light loss.
9-20], yet in practice lighting design professionals rarely use a lamp lumen depreciation value corresponding to 70 percent of lamp life.
The recent work of Lemons [Lemons 2008] suggests that there may be both an initial tilt factor and a lifetime tilt factor, which is based on the idea that lamp lumen depreciation may be dependent upon lamp orientation.
If the illuminance is right when the facility is upgraded or relighted, it will be wrong as lamp lumen depreciation and the dirt factor start to kick in," Fetters says.
Recoverable light losses included Lamp Burnout Depreciation, Room Surface Dirt Depreciation, Lamp Lumen Depreciation and Luminaire Dirt Depreciation (LDD).
One is lamp lumen depreciation, the steady lessening of light output from a lamp over time, while energy consumption remains constant.
Deco induction luminaires feature instant-on, no restrike, cold weather performance down to-40 deg C/F, electrode-less lamps for vibration resistance, superior lamp lumen depreciation with 80 percent lumens at 60,000 hours, 90 CRI color and a 10-year warranty.