FAQ
Company and Product Basics
What kind of company is YESUN LED?
What are the core advantages of YESUN LED?
Are you a trading company or a factory?
What types of LED products do you mainly produce?
What are the advantages of your LED lights over traditional lighting fixtures?
What is luminous flux/lumen?
What is color temperature?
What is the color rendering index?
Do you have a minimum order quantity requirement?
Could you provide a product catalog and price list?
Are your products brand new?
Do you have your products in stock?
Technical Parameters and Selection
How do I choose the right LED lighting for my space?
What is IP protection level?
Your LED lights have a lifespan of 50,000 hours. How is that calculated?
What is light attenuation?
How to understand beam angle?
What is the operating voltage range of your LEDs?
What is the material of the lamp?
OEM/ODM and Customization Services
Do you provide OEM/ODM services?
What is the process for customizing products?
Can samples be provided free of charge?
How long does it take to make a sample? How is the cost calculated?
Can you customize special sizes and shapes?
Can you replicate or improve my existing product?
Procurement, Pricing and Payment
How to get a quote?
How long is the quote valid?
Does the price include shipping and customs fees?
What payment methods do you accept?
Can you provide a pro forma invoice?
How long after I place my order will it be shipped?
Can I cancel or modify my order?
Do you offer discounts?
Logistics, Delivery and After-sales Service
What logistics services do you provide?
Can I track my shipment?
What should I do if I receive the goods and find that the quantity is incorrect?
What should I do if there is a problem with the product quality?
What is the warranty period?
What exactly does the warranty cover?
How do I apply for after-sales service?
Do you provide technical installation support?
Can I return or exchange this item?
Do you provide repair services?
What documents will be provided when shipping?
Certification, Compliance, and Partnerships
What international certifications have your products passed?
Can you provide a certification certificate?
I'd like to become your agent. What are your policies?
Do you participate in domestic and international LED exhibitions?
Can we visit the factory for an on-site inspection?
How can we maintain business relationships with you?
Can I use the images and content on your website?
How can I contact you for more information?