Road lighting equipment quality appraisal

As an important part of urban infrastructure, road lighting equipment plays a key role in ensuring traffic safety, improving urban aesthetics, and promoting night-time economic development. Its applications cover urban roads, highways, tunnels, bridges and other scenarios, achieving a balance between energy saving, environmental protection and functionality through reasonable lighting design. Compared with traditional high-pressure sodium lamps, modern LED lighting equipment has become the mainstream choice in the industry due to its high light efficiency, long life, dimmable and other characteristics. The quality of road lighting equipment directly affects public travel safety and energy efficiency, and is an important support for the construction of smart cities.

As the scale of urban lighting projects expands, quality disputes occur frequently. The focus of judicial disputes focuses on: whether the equipment meets the technical indicators such as light intensity, color temperature, and lifespan stipulated in the contract; whether there is corrosion of the lamps and excessive light decay due to material defects; whether the control system is stable and reliable; and the correlation between quality problems, traffic accidents, and energy waste, etc. In such cases, the quality appraisal of road lighting equipment uses technical means such as illumination testing and material analysis to provide a scientific basis for the court to determine liability and loss compensation, and promote the standardized development of the industry.

Zhongke Testing is a product quality appraisal service organization registered with the court. It can provide quality appraisal services for road lighting equipment. It has a professional appraisal team and advanced instruments and equipment to provide fair and accurate appraisal results for the quality appraisal of road lighting equipment.

Road lighting equipment quality appraisal technical methods include:

1. Appearance inspection: Check whether the lamp shell material (such as aluminum alloy, PC plastic) meets the weather resistance requirements, and whether there is rust or cracks on the surface. Check the sealing performance of the lamp and test whether the waterproof level (IPX6/IPX7) meets the standard to prevent rainwater penetration from causing circuit failure.

2. Optical performance test: Use a illuminance meter to measure the road illumination value to verify whether it meets the design specifications (such as main road illumination ≥ 30lux). Analyze parameters such as color temperature and color rendering index to evaluate lighting comfort and color discrimination capabilities.

3. Electrical performance testing: test the efficiency and power factor of the driving power supply to confirm whether it meets the energy-saving requirements (such as power factor ≥ 0.9). Check the effectiveness of the lightning protection grounding system to prevent lightning strikes from damaging equipment.

4. Durability evaluation: predict the life of the lamp through accelerated aging tests (such as QUV UV aging, heat and humidity cycle) and record the light decay curve. Simulate extreme temperature environments (-40℃~85℃) to test the working stability of the equipment.

The applicant, a municipal engineering company, and the respondent, a lighting equipment company, signed an "Urban Road LED Street Light Procurement Contract", agreeing to purchase 1,000 sets of LED street lights with model number LX-500. Within half a year after the project was accepted, many street lamps experienced serious light attenuation (illuminance dropped by more than 50%), lamp shells cracked and other problems. The municipal corporation considered the equipment to be materially defective and demanded compensation for replacement costs and repair losses. The lighting company argued that the problem was caused by improper installation or environmental factors, and both parties went to court. The court entrusted a third-party appraisal agency to conduct quality appraisal of the lamps involved in the case.

Identification analysis results:

The quality analysis expert group discussed and comprehensively analyzed the relevant information of "lighting equipment", contract technical agreements, on-site investigation case materials and other data, and made the following quality analysis opinions:

1) The materials are shoddy: the shell is made of recycled materials and the LED chip is a refurbished part, which directly leads to excessive light decay and structural cracking.

2) Design defects: unreasonable sealing structure and insufficient heat dissipation system efficiency, exacerbating the risk of equipment failure.

Road lighting equipment quality appraisal report should include the following content:

Appraisal client information

Basic equipment information

Identification technical method

Identification results