... the 10*23mil chip size should get longer lifespan,what we use is 10*23mil The lighting-decaye of 10*23mil,10 ... ,8*18mil after 6000hours under 95℃ ambient . the Driver we use is ledfriend, which is TUV,ETL,SAA,CB,DLC,etc ... : The parameter of the driver: The good qualiy PCB we use: SZAMB LED TUBE Certificate: warranty 5 years warranty