... output voltage Long lifetime Overvoltage and overload protection constant current 20w led driverFeatures1.With the design of high-efficient,low-loss ... and supply fluctuations,respectively,90V to 246V and 47 HZ to 63 HZ.8.Transportation and storage environment,respectively,at the temperature ... °C—70°C and 0°C—95°C. constant current 20w led driver