Highway LED lighting fixtures Part 4: Bridge guardrail LED lighting fixtures Scope 1 JT/T 939 This part specifies the composition, classification and model, technical requirements, test methods, inspection rules, as well as requirements for marking, packaging, transportation, and storage of bridge guardrail IED lighting fixtures. This section is applicable to the production, inspection, and use of bridge guardrail lighting fixtures using LED as the light source. The following normative references are essential for the application of this document. For dated references, only the dated version applies to this document. For undated references, the latest version (including all modification orders) applies to this document. GB/T 191 Packaging, Storage and Transportation Pictorial Markings CB/T 4208 Degrees of Protection Provided by Enclosures (IP Code) GB/T7922 Methods for Measuring the Color of Lighting Sources GB/T 9468 General Requirements for Luminaire Distribution Photometry JT/T 939.1 Highway LED Lighting Luminaires Part 1: General Principles
Function of testing report:
1. Project bidding: Issue authoritative third-party CMA/CNAS qualification report
2. Online e-commerce platform entry: Quality inspection report recognized by major e-commerce platforms 3. Used as a sales report: issuing legally effective testing reports to make consumers more confident 4. Papers and research: Provide professional personalized testing needs 5. Judicial services: providing scientific, fair, and accurate testing data 6. Industrial problem diagnosis: Verify the troubleshooting and correction of industrial production problemsBaijian and testing process:
1. Telephone communication and confirmation of requirements
2. Recommend solutions and confirm quotations 3. Mail samples and arrange testing 4. Progress tracking and result feedback 5. Provide reports and after-sales service 6. If urgent or priority processing is requiredTesting and testing characteristics:
1. The testing industry is fully covered, meeting different testing needs
2. Fully cover the laboratory and allocate localized testing nearby3. Engineers provide one-on-one services to make testing more accurate
4. Free initial testing, with no testing fees charged
5. Self service order delivery for free on-site sampling
6. Short cycle, low cost, and attentive service 7. Possess authoritative qualifications such as CMA, CNAS, CAL, etc 8. The testing report is authoritative and effective, and is generally used in China