Life of LED Light

LEDs are sustainable, eco-friendly, efficient, and safe lighting solutions that deliver multiple benefits to the users. One of the benefits of LED is its long lifetime.Because they have no movable parts  or filaments tht may break, LED’s can have long lifetime.

LEDs generally do not fail by burning out but will slowly reduce in light output over time; as solid state devices they will continue to operate even after 100,000 hours, continuing to use electrical power even if they produce very little useful light.

LEDs, however, follow a different method for measuring life expectancy called lumen maintenance.

What is lumen maintenance?

Lumen maintenance is an approach of measuring the light output (lumens) of a brand new light source and comparing that with its light output after a certain period of time. L70 and L50 are examples of lumen maintenance – benchmarks for when 70% or 50% of a lamp or fixture's total light output remains.

What is L70?

It is rated lumen-maintenance life measured in hours with associated percentage of light output, noted as Lp. In other words, L70 of 30,000 hours means that the tested LEDs produce 70% of the initial light output at 30,000 hours. If an LED has L50 of 30,000 hours, its lumen output decays faster than one with L70 of 30,000 hours."

LED lights are known to last longer and typically enjoy a lifespan of almost 50,000 hours. However, it also depends on various factors.

Factors that can influence the lifespan of LED luminaires:

1. Power supply

Operating luminaires above their recommended power requirement can significantly reduce their life. LED bulbs require a reliable power supply (commonly known as a driver) that assists in maximizing the power output and life expectancy. It ensures optimal supply of electricity that eventually helps in controlling and regulating the voltage.

2. Ambient temperature

The temperature of the location (where an LED bulb is installed) in known to largely influence the life of an LED luminaire. Enclosed lighting fixtures can experience a surge in the ambient temperature that can affect the chip and the driver. This can significantly reduce the lifespan of the luminaire. Hence LED lights should be installed in locations that flourish enough space for heat to dissipate and allow proper cooling.

3. Capacitors and drivers

Old LED luminaire drivers used plastic capacitors for storing energy; these capacitors would only last for a year as the plastic capacitors were largely affected by external factors like heat and ambient temperature, and hence, experienced a shorter lifespan. However, latest designs are now using ceramic capacitors in their LED drivers as they possess a higher tolerance against heat to ensure a longer life.

4. Heat emission

Chips and heat sinks in the LED light bulb are sensitive to high temperatures. For instance, if the temperature of an LED luminaire crosses 85°C, the life of the chip is expected to reduce. Thus, the temperature of the bulbs should be 85°C. This is beneficial not only for the heat sink but also for the life of the luminaire.

The area, application, current, temperature, frequency of use, and even the way in which an LED light is used can affect the lifespan of the bulb, so while manufacturers will often provide an estimated life on the packaging, this shouldn’t be taken as the exact measurement. 







Comments

Post a Comment

Popular posts from this blog

COLOR COMBINTIONS OF LED LIGHTS

Image
In LED lights ‘Color’ refers to the color of light that the diode emits – this can be any color.   Colored LEDs are all around us, in decorative applications, also being used for communication and indication purposes.  LEDs can generate up to 16 million colors. The material used in the semiconducting element of LED determines its color. A color-changing LED contains three separate diodes within the same bulb casing. Each of these diodes emits its own, specific color – red, green, or blue. When all three diodes are switched on at full capacity, white light is produced. Adjusting the intensity of each diode allows a range of different colors and shades to be created. RGB Concept The RBG concept is an additive model, these colors are used because our eyes see all colors as different combinations of red, green, and blue wavelengths. Red and amber LEDs use the aluminum indium gallium phosphide (AlInGaP) material system. Green diodes, whereas, use gallium phosphide and blue...
Read more

COB LED

Image
The latest LED improvement has been “Chip On Board” or COB innovation.  A COB (Chip-on-Board) is an LED packaging technology that describes mounting multiple LED chips directly onto a substrate to form a single module.    Multiple LEDs, minuscule in size, are wired and packaged together into a single ceramic or copper board so that they function as a sole light source. ​ They are sometimes nicknamed “fried eggs” (when they are not lit) because of their yellow phosphor circle on a white board. COBs are made up of multiple chips, usually with a minimum of 9 on a board.  Due to the small size of the LED chips (imagine a quarter), Chip-on-Board technology allows for a much higher packing density than surface mount technology (SMD). COB chips only have 1 circuit and 2 contacts, regardless of the number of the diodes. When a COB LED package is energized, it appears more like a lighting panel than multiple individual lights as usually the case with other LED packages, li...
Read more

LED Bulb - Structure & Types

Image
LED light bulb  produces light using light-emitting diodes (LEDs). LED lamps are significantly more energy-efficient than equivalent incandescent lamps and can be significantly more efficient than most fluorescent lamps.                          We can put LED bulbs in regular lighting fixtures.  This includes fixtures that have previously used incandescent bulbs or CFL bulbs. After all, LED light bulbs are intended to replace old light bulb designs that are less energy efficient. Be sure to choose an LED bulb with a base, shape, and wattage that is compatible with the fixture. As LED bulbs are being manufactured in every possible design, it should easy to find the right fit for your lamp or chandelier. There are 2 types of LED Bulbs Driver LED bulb In these types of Bulb, a separate driver circuit is used for power supply. LEDs are mounted on separate chipset. DOB ( Direct On Board...
Read more