it is not as simple as 100W driver = 100 watt LEDS
the driver CAN drive up to 100 watts yes but the LED panel itself is going to dictate the MAX output power it can take in
the driver is a constant current driver and will drive a constant MA and the voltage will rise / lower to reach that milli amp output and the number of leds in series OR parallels will determine the voltage to drive the Milli amps the drivers have a set output milli amps and that is adjustable