How to find an outstanding Chinese led wall pack lamp factory?

After long-term survey , I found some common characteristics of excellent Chinese led wall pack lamp factory , the details are as follows :

  1. ISO9001:2015 certificated producing process
  2. Factory workers with vocational training
  3. Delivery led wall pack lamp on schedule
  4. wall pack lights commercial with correlating certifications , like CE , RoHS , SASO , BIS , ETL , UL ,etc
  5. wall pack light led with warranty