Constant power drive, constant current output control mode; Class I structure. Input voltage: 100-277Vac (H version derating below 180Vac) Protection rating: IP67 Lightning protection rating: 75W and below 4KV/6KV, 100W and above 6KV/15KV. Isolation dimming function: Three-in-one dimming (0-10V, PWM, resistor dimming) Dimming logic: 0/1-10V, 0-5V dimming positive and negative logic selectable. Protection functions: Short circuit, over-temperature, over-voltage, under-voltage protection.