How to find superior Solar street light factory ?

For overseas solar street light buyer , they prefer best and cheaper integrated solar driven roadway lamp , which producing from Solar street light factory . After long-term survey , I found some characteristic of outstanding solar street light vendors , the details of excellent solar street light supplier are as follows :

  1. Producing process with ISO9001:2015 certificated
  2. Factory workers with vocational training
  3. Delivery high quality solar street light on schedule
  4. solar powered street lights with correlating certifications , like CE , RoHS , SASO , BIS , ETL , UL ,etc
  5. solar roadway lighting ledwith warranty