The main reason is:
1, no professional equipment
2, the purchase is finished, and no single test sample
3 the LED chip is lack of knowledge.
First us cognitive LED chips. What is LED? Simply light-emitting diodes. In earlier years used as a indicator LED is mainly used in the circuit. With the ever-changing, LED technology has become increasingly mature, field of use has been gradually expanding, LED gradually into the lighting market, widely used in all aspects of lighting.