What is LM-79 test report?
LM-79 testing captures performance characteristics of EPCO’s solid-state LED luminaires. This testing provides a snapshot of our LED luminaires performance under specified operating conditions typically referred to as initial measurements.
What is LM-79 in lighting?
LM-79 is an approved process that measures the electrical and photometric properties of LED products. This process includes luminous flux, electrical power, efficiency, chromaticity as well as the diffusion of luminous intensity.
What is LM-80 test report?
LM-80 refers to a method for measuring the lumen depreciation of solid-state light sources, such as LED packages, modules and arrays. Typically, LED component manufacturers each report lumen maintenance data using their own methodology making it vary hard to compare “like for like”.
What is tm21 report?
TM-21 outlines a standard calculation method to predict future lumen depreciation using LM-80 data. These standards ensure consistent reporting from LED manufacturers, enabling lighting professionals to make sound decisions when specifying luminaires.
What is LM in electrical?
The lumen (symbol: lm) is the SI derived unit of luminous flux, a measure of the total quantity of visible light emitted by a source per unit of time.
What is lumen maintenance factor?
The amount of light from the light source at a specific time in the future is referred to as the lamp lumen maintenance factor, or LLMF. The lifetime of a LED module is defined as the time it takes until its light output, or lumen maintenance, reaches 70% of the initial output. This is also called L70.
What is LM 70?
L70 refers to the point in time when an LED is producing 70 percent of its initial light output. For example, if an LED light fixture produces 10,000 lumens when it is new at some point it will fade to 7,000 lumens. This point in time is referred to as L70.
What does LM-80 stand for?
LM-80 is a method for measuring lumen depreciation. LM-80 refers to a method for measuring the lumen depreciation of solid‐state light sources, such as LED packages, modules, and arrays.
What does LM stand for in lighting?
Lumens = Light Output. In simple terms, Lumens (denoted by lm) are a measure of the total amount of visible light (to the human eye) from a lamp or light source. The higher the lumen rating the “brighter” the lamp will appear.
What are the elements required to calculate the value of 1 watt?
The formula for calculating wattage is: W (joules per second) = V (joules per coulomb) x A (coulombs per second) where W is watts, V is volts, and A is amperes of current. In practical terms, wattage is the power produced or used per second.
What is LM 84?
The Illuminating Engineering Society of North America (IESNA) Approved Method for Measuring Luminous Flux and Color Maintenance of LED Lamps, Light Engines, and Luminaires (LM-84-14) is a document which addresses the changes in photometric performance of SSL systems over time.