LED lights with lights, some light, and some light, or in the middle of a section will not light
Whether to buy is cheap chips, is lit when the naked eye can see the chip in the core... (good chip luminous flux is relatively high, there is a chip dazzling, bright look not clear) of each section on the chip is a multiple of 3 or 3? If so, that's the shoddy chip. It's broken.
Does the length of a section of lamp belt exceed the standard? No problem under 20 meters.
Part of the lamp LED lamp belt has been burned, may according to the voltage is not normal, or lamp with poor quality, recommended to buy brand products.