The copper coating is cheaper, and the copper coating is more expensive. Copper coated pads tend to fall off when bent, while rolled copper does not. The specific use of which kind of material FPC, to see the procurement of their own according to the use of the environment to make a decision. Is the FPC certified for environmental protection or UL? LED has no patent, etc. There are certified and patented, the price is more expensive, not cheap. LED brightness: different brightness LED prices are different, ordinary brightness and high brightness LED prices are quite different. Therefore, when purchasing, we must clearly know what kind of brightness we need, so as to accurately position our products.