led street light fixture life evaluation and maintenance cost analysis
led street light fixtures are becoming more and more popular, and their longevity and maintenance costs have received a lot of attention. This article will evaluate and analyze the life and maintenance cost of led street light fixture from a technical point of view to provide reference for relevant practitioners.
led street light fixture life assessment
1. Definition and measurement method of LED life
The life of LED luminaires generally refers to the use time under specific application conditions, usually with luminaires brightness reduced to 70% of the initial brightness as the standard. The length of life is affected by many factors, including giant crystals, encapsulation materials, heat dissipation, power supply, optical design, etc.
There are many methods to determine the life of LED lamps, including accelerated life test method, fault simulation test method, time and luminous flux maintenance time test method. Among them, the accelerated life test method is a more commonly used method, which calculates the life of LED lamps by testing them for a long time and determining the brightness loss under high temperature, high humidity, high pressure and other conditions.
2. Factors affecting the life of LED lamps
The life of LED lamps is affected by many factors, mainly including the following aspects:
(1) Giant crystal quality. The quality of giant crystals directly affects the luminous efficiency and reliability of LED chips, and high-quality giant crystals can improve the life of LED.
(2) encapsulation material. The encapsulation material provides protection and heat dissipation for the LED chip, which affects the luminous efficiency and life of the LED luminaire. At present, the mainstream encapsulation materials are epoxy resin, silicone, polyurethane and so on.
(3) Heat dissipation. The heat dissipation effect of LED lamps directly affects the temperature and life of LED chips. Excellent heat dissipation design can improve the service life of LED lamps.
(4) photoelectric devices. As a device to stabilize the current of LED lamps and protect LED chips, photoelectric devices have a great impact on the life of lamps and lanterns. In the design of lamps, devices with long life, stable structure and high precision should be selected.
(5) Power supply. The stability and accuracy of the power supply, anti-interference and other characteristics will affect the life of the LED lamp. High-quality power supply can ensure the stable operation of LED lamps.
led street light fixture maintenance cost analysis
1. Components of maintenance cost of led street light fixture
The maintenance cost of led street light fixture mainly includes the following aspects:
(1) Maintenance manpower cost. led street light fixture daily maintenance, cleaning, fault repair, etc., need manual participation, resulting in certain labor costs.
(2) Equipment cost. The equipment required to maintain the led street light fixture includes climbing tools, cleaning tools, maintenance tools, etc. The purchase and update of these equipment requires a certain investment.
(3) Electricity cost. led street light fixture consumes a certain amount of electricity when it runs, resulting in a certain cost of electricity.
(4) Material cost. The materials required for daily maintenance of led street light fixtures include light bulbs, power supplies, driver boards, etc. The update and replacement of these materials also require a certain cost.
2. Maintenance cost analysis of led street light fixture
led street light fixture has a low maintenance cost compared to traditional street lights. First, led street light fixtures last longer than traditional street lights, reducing the number and cost of replacement and maintenance. Second, the energy efficiency of led street light fixture is higher than that of traditional street lights, and the electricity and electricity costs are less. In addition, the design of led street light fixtures is streamlined, and the cost of maintaining and replacing lamps and materials is also reduced.
However, it is important to note that maintenance costs can be high if the led street light fixture fails or if materials need to be replaced. Because the design of led street light fixture is more complex than that of traditional street lights, professional tools and technology are required for maintenance. At the same time, the materials and lamps for led street light fixtures are more expensive than traditional street lights, and the cost of maintenance and replacement is also higher.
led street light fixture life evaluation case study
Taking the led street light fixture used in a certain street of a city as an example, the life evaluation analysis is carried out. The use of the led street light fixture is located on the main street of the city, the daily lighting time is 10 hours, and the switching time is 2 hours. The street lamp uses 100W LED lamps, the use voltage is 220V, and the current is 1.3A.
After analyzing the dimensions, heat dissipation, power supply, optical design and other factors of the led street light fixture, it is concluded that the expected life of the street light is 6 years. It is expected that the use of the lamp will reach 3 years, the brightness loss will reach 30%.
led street light fixture maintenance precautions
The maintenance of led street light fixture requires attention to the following issues:
(1) Lighting deviation. The light emitted by LED lamps is directional and not uniformly irradiated, which needs to be fully considered in design and maintenance.
(2) Dust. LED lamps are easy to accumulate dust, affecting illuminance and heat dissipation, and need to be cleaned and maintained frequently.
(3) Use environment. The use of LED lighting environment determines its life and reliability. Especially for outdoor LED lamps, it is recommended to install lightning protection and waterproof facilities to avoid circuit short circuit and damage to components.
Summary: This paper mainly analyzes the life and maintenance cost of led street light fixture from the technical point of view, and expounds the advantages and precautions of led street light fixture through case analysis and theoretical analysis. As a practitioner in the led street light fixture industry, we should fully understand and master these technical points, improve the performance and life of street lights, reduce maintenance costs, and make greater contributions to the lighting cause of the city.