4 PIN wire stands for 

Red : + 12V 

Green : DAT

Yellow : DAT

Black : GND 

Connection: 
1) Signal wire: DC+,  DAT, GND
2) DC+ and GND connect to power supplier;  DAT and GND connect to controller
3) Relative Controller: SPI controller support WS2812B/WS2811 ; when use DMX decorder, can connect to DMX system

1 Do you offer free sample ?

Yes, we offer free sample based on a limited amount

2 Do you have MOQ ?

NO, 1 piece is always welcome. 

3 What is the main market for Ledbuilders?
We are selling more to EU, Australia and north America because the markets have high quality standard for LED products. The rate stands our turnover up to 70-80%. But other new markets are increasing demand of the new LED technology. We are also optimistic about the markets for other American and Asian regions.

4 What LEDs do you usually use for your LED products?
We have 2 levels of LEDs. One is brand LED like SAMSUNG, NICHIA, BRIDGELUX, LUMILEDS, etc. The other is China brand with Epistar or Sanan chip, which all with LM-80 report. 

5 What is Ledbuilders lead time?
Usually in 2 week for formal order, 1 week for sample order. For OEM/ODM products, delivery time depends on the request of product.

6 Can Ledbuilders do custom assembly or offer OEM product?
Ledbuilders has gained a lot of experience on OEM assembly of LED strip lighting. The strips can have different size, layout, customer logos and labels. We also want to apply the experience to LED luminaires as we have good design and engineering team. We will strictly follow the principal that we won’t disclose or sell customer unique designs or jointly developed products to another third party.

7 Do you have warranty for products?
Yes, we have 3 and 5 years warranty for different kinds of products. During the period, if customers have the approval showing product quality issues and if certified by Ledbuilders engineers, we would request customers to ship back the failure parts and replace new items with the transportation charged being paid by us.

8 Does Ledbuilders design its products?
Yes, Ledbuilders designs and assembles all the products we are selling. Our engineers have abundant knowledge of optics, electronics, mechanical and thermal management, as well as light control technology. Some of them have successful experience to design lighting products for world famous brands. Our basic principle to design internal driver and circuit is safety under EMC/UL list possibility and reliability.

9 How to buy Ledbuilders products?

You can directly click " Contact Supplier " to send us inquiry, our sales team will get it and respond immediatly.