Contact
Contact
One address reaches us, and it is read by the people who write these notes rather than by a ticketing queue. What you get back depends heavily on what you put in, so the guidance below is worth thirty seconds.
Published by Yilian Zhikong Technology (Shenzhen) Co., Ltd., registered in Shenzhen, China. We reply in English or Chinese.
What to include
| If you are writing about | Include |
|---|---|
| A technical correction to a page | The page URL, the specific sentence, and what it should say. If it turns on a standard, the clause number. We will name the correction on the page if you want the credit, or not if you do not. |
| A specification question | Room or application, mounting height, the illuminance and glare targets you have been given, and what you have already been quoted. Without those we can only restate what is already on the site. |
| A product or supply enquiry | Quantity, target market and its certification requirement (CE, UKCA, FCC, CCC), and the control interface you need. Say whether you need photometric files for the fitting, because that changes lead time. |
| Privacy, data or advertising on this site | Which page, and what you want done. See the privacy policy for what is collected and by whom. |
What we cannot help with
- Design sign-off for a specific building. We are not a design practice and carry no professional indemnity for design advice. Anything involving emergency egress, fire strategy or electrical safety needs a qualified engineer engaged on your project.
- Diagnosing another manufacturer's product remotely. If a fitting is failing, its supplier holds the data — driver spec, thermal design, production batch — that a diagnosis actually depends on.
- Live electrical work instructions. Mains work is for a qualified electrician working to the wiring regulations of your jurisdiction.
Reporting an error on a page
Corrections are the most useful message we get and the easiest to act on if they are specific. Give the page URL, quote the sentence, and say what it should say instead. Where the point turns on a published document, the clause number saves a round trip — every standard referenced anywhere on the site is listed with its publisher on the standards and sources page, so the reference is usually already half-written.
Standards get revised and clause numbers move between editions, so a correction that amounts to "this was true of the previous edition" is still worth sending. Corrections that turn out to be right get made, the page's review date moves, and we will name you on the page if you want the credit or leave you out of it if you do not.
What happens to your message
It goes to a mailbox read by the people who write these notes. There is no CRM behind it, no marketing sequence, and no newsletter to be added to. We do not sell, rent or share contact details, and we do not send anything you did not ask for. If you write once about a specification question, you will not hear from us again unless you write again. What the website itself collects, as distinct from what you send us, is set out in the privacy policy.
One practical note on attachments: photometric files, test reports and calculation sheets are welcome and are usually what makes a question answerable. Spreadsheets and PDFs are fine. Please do not send anything commercially confidential without saying so in the message — we will treat it accordingly, but we would rather be told than assume.
Response time
Usually two to three working days. Chinese public holidays add to that. If a message goes unanswered for more than a week, it is worth resending — a small number of enquiries get lost to spam filtering in both directions.