What characteristics of LED you should know about?

This article will help reader learn about more what’s led output, efficiency, and lifespan of led.

1.What’s Light Output?

·Luminous Flux

Lumen Output Measurement

Lumen Output Measurement is the process of quantifying the total amount of visible light emitted by an LED light source. This measurement provides a standardized way to evaluate and compare the brightness of different LED lighting products. By measuring the total luminous flux, or lumens, emitted by an LED, manufacturers and consumers can better understand the light output capabilities of a given LED light source.

2.Luminous Intensity

Luminous intensity is a measure of the amount of light emitted in a specific direction, as opposed to the total amount of light emitted, which is known as luminous flux. Luminous intensity is a directional measure of light, and it is typically measured in candelas (cd). This metric is important for understanding the distribution and focus of light from a source, which is crucial for applications like lighting design, where the directionality of light is a key consideration.

Efficacy Optimization

Luminous Efficacy is a measure of the efficiency of a light source, specifically the ratio of the total luminous flux (light output) to the total power input. It quantifies how well the light source converts electrical energy into visible light. Luminous Efficacy is typically expressed in lumens per watt (lm/W), and it is an important metric for evaluating the energy efficiency of lighting products. A higher luminous efficacy indicates a more efficient light source, which can lead to lower energy consumption and operating costs.

2.About Energy Efficiency

LED Power Consumption

Lumen per Watt Ratings

Lumen per Watt ratings measure the energy efficiency of LED lights by quantifying the amount of light output (lumens) per unit of power consumed (watts). This metric is a key indicator of an LED light's energy efficiency, as it directly reflects how effectively the light source converts electrical power into visible light. A higher lumen per watt rating signifies a more efficient LED light, which can lead to lower energy consumption and operating costs. This makes the lumen per watt rating a crucial factor to consider when evaluating and comparing the energy efficiency of LED ceiling lights and other LED lighting products.

3. What’s LED Lifespan's Standard and regulations

Lifetime rating protocols: LM-80, TM-21, LM-84 Testing

LM-80, LM-84 Testing refers to the standards that measure the lumen depreciation and color shift of LED light sources over time, providing data on their long-term performance.

TM-21, IES LM-84 Projection

TM-21, IES LM-84 Projection is a specific industry standard protocol that estimates LED lifetime based on lumen maintenance projections from accelerated testing data, rather than relying solely on empirical data.

TM-21 (IESNA) is a technical memorandum that specifies the methodology for projecting the lumen maintenance of LED light sources, taking into account time and temperature factors.

IES LM-84 Projection is a lifetime projection method that forecasts the expected lumen maintenance of LED light sources based on accelerated life testing data.

Thanks for your time, hope these information is helpful to help you learn about what's led output, efficiency and lifespan test measurement.

Feel free to contact Rice Lighting if you have demands in led lightings:)

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