1. Orders for LED lighting

(1) If you are interested in any of our LED products, you just tell us model items, quantity and specific information such as color, brand of LEDs and beam angle via email, fax or just leave a message on our website. Our sales staff will reply you with the requested price information, including shipping options and estimated lead time within one business day;

(2) If no problem, you agree with the price and make a choice on shipping method;

(3) We work out the Proforma Invoice for your confirmation. The P/I has all the necessary dealing and delivery and our banking information.

(4) After making sure all information is correct, you make payment.

(5) We confirm the payment and arrange production and shipment accordingly.

(6) We will keep record for shipment and update any news for you, and also we will follow up your test results and offer support and help.

2. MOQ

Yes, of course. Usually our MOQ is 200pcs, but sample order is welcome.

Even 1pc led light, we can accept that.

3. Payment term

For small order or sample order, please pay us Western Union. For large orders, we would like to recommend T/T; We usually collect 50% of total amount as deposit, and collect the balance before shipment, please send us the copy of remittance slip once the payment is done, so we can check with our bank and confirm to you once the payment arrive to bank account.

Any way Western union is preferred, because Western Union transfer is the fastest way to transfer money. We can receive money in several minutes if customers wire the money successfully. It's also the easiest way of transfer & receiving money. Please let us know the money control numbers, sender's full name and the exact amount you send once you wire the money.

4. Lead time

For regular products, Lead time of large order is 10-15 working days after receiving deposit; lead time of sample orders is 5-7 days after we receive payment.

5. Shipment

Usually buyers will receive samples in 5-7 working days 3-5 working days to processing samples, 3-4 working days to ship the samples by UPS/DHL/FedEx/EMS Express.

We usually ship small order by air. There are many international couriers for your option, such as DHL, FedEx, UPS and China EMS. If you already have account with DHL, UPS or other couriers, you can advise us in advance and we can send the goods under your account.

We usually ship large orders by sea. In general, the ocean shipment will spend more days than by air. So the shipping way is subject to your demand in advance. And customs clearance paperwork and procedures will be handled by the forwarder. In case of any additional documentation, Winvi will assist the forwarder with it as much as possible.

6. How to track your order during shipment?

For small order shipped by international courier (UPS/DHL/FedEx/EMS), Winvi will send you tracking No. after samples went out, you can check the order status on courier's website. For Large orders shipped by sea, you can check with your shipping agent.

7. Warranty statement

Usually Winvi LED warranty time is 3 years.

Winvi warrants that its product will be free from any defects in materials and workmanship which cause the product to fail to operate in accordance with the performance specifications set forth in the documentation accompanying the product. The foregoing warranty shall be valid for a period of three years from date of customer's purchase (the invoice date) from Winvi. If any Product covered by this warranty is returned by customer in accordance with Winvi's Products Return Policy within the warranty period, and upon examination, Winvi determine such Product failed to satisfy this warranty, We will, at its option, repair or replace the product or the defective part or keep it as a credit apply for future orders.

For purposes of clarity, "repair or replace the product or the defective part” does not include any removal or reinstallation costs or expenses, including without limitation labor costs or expenses. If Winvi chooses to replace the product and is not able to do so because it has been discontinued or is not available, Winvi may replace it with a comparable product.

This limited warranty only applies when the product has been properly wired and installed and operated within the electrical values, operating range and environmental conditions provided in the Specifications.

This warranty does not apply to damage or failure to perform arising as a result of any Acts of God or from any abuse, misuse, abnormal use or use in violation of any applicable standard, code or Winvi's instructions or damage causing during shipping to customer or beyond.

This Warranty shall become void in the event any repairs or alterations not duly authorized by Winvi in writing are made to the Product by any person.

Winvi will not cover additional labor cost or Warranty such labor associated with replacement product. Related accessories, software, shipping charge and any product free of charge are not included in this warranty policy.

8. Aging test before shipment

It is made for each product.

Test time: 24-48 hours under high ambient temperature: 35~40℃.


(1) First 4 hours: let them light uninterruptedly.

(2) Second 4~5 hours: test the function of switch every 30 minutes by turning on and off the switch repeatedly 2~3 times. The interval between turn on and off of the switch is 30 seconds.

(3) The balance hours: let them light uninterruptedly.

9. Quality control

From materials to finished products, we will inspect and test them one by one strictly to guarantee the quality of product.

IQC for each component and material before production;

IPQC for welding test, vibration test and power test during production,

Finished product inspection for aging test and appearance inspection before package.

10. LED knowledge

(1) Luminous flux

Luminous flux is the measure of the perceived power of light. It differs from radiant flux, the measure of the total power of light emitted, in that luminous flux is adjusted to reflect the varying sensitivity of the human eye to different wavelengths of light.

Lumens = (radiant flux) (630lm per watt) 1lm=1cd·sr

Example: ordinary 40W fluorescent lamp luminous flux of 2200 lumens (100 hours)

The flux of 1W power domestic incandescent light produced is about 12.5lm (4tlm)

(2) Luminous intensity

Luminous intensity is a measure of the wavelength-weighted power emitted by a light source in a particular direction per unit solid angle, based on the luminosity function, a standardized model of the sensitivity of the human eye.

The unit of luminous intensity is the candela (cd), an SI base unit. A candle's luminous intensity is about 1cd. Domestic 100W incandescent luminous intensity of about 100cd.

(3) Illumination: the luminous flux per unit area.

Therefore, the surface illumination is said to a measure of the degree of the surface to be illuminated by light, in units of lux (Lx).

(4) Brightness

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target. Unit: candela per square meter, symbol: cd / ㎡.

(5) Light effect:

Light-emitting efficiency is the ratio of light flux and power consumption.

Unit: lm / W

Luminous efficiency of incandescent bulbs normally about 7 ~ 20lm / W

Light effect of Straight fluorescent light is about 30 ~ 60lm / W, so the use of fluorescent lamps is morn energy saving than the use of incandescent lamps.

(6) Color temperature

CCT shows color numbers of lighting source. Unit: K

Warm white: WW (2800-3300K or 2700-3200K)

Natural white: NW (4000-4500K)

Pure white or cool white: PW/CW (5500-6500K)

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