The Watts of an LED is the wrong criteria to select an LED driver.
LEDs for lighting applications typically have a wide range of operating current. Therefore they also have a wide range of wattage. Meaning LEDs do not have a set wattage. The actual wattage depends on temperature, current and resultant forward voltage Vf where the Vf is a function of temperature, current, and manufacturing characteristics.
Step 1 is to determine the current requirement for your LED(s).
Step 2 is to calculate (min-max) or measure the forward voltage Vf of the LED or sting of LEDs at the target current.
Below is an example IV curve for a Cree XP-G3 LED. Its wattage, as shown on this IV curve, ranges from 200 mW to 6 watts. But is generally referred to as a 1 watt LED (@ 350 mA "test current").
An AC to DC constant current driver is a two stage circuit. The first stage is to convert the AC to a fixed DC voltage. The second stage converts the fixed DC voltage to a constant current. If the Vf and DC supply to the constant current stage are too far apart efficiency will suffer. So LED drivers usually are sold with a range of voltages and currents.
Below is the voltage and current ranges for a popular LED driver. This particular driver (Mean Well HLG-40H) can supply up to 40 Watts.
Generally speaking as the voltage of the LED driver increases from 12V to 54V the efficiency improves. So for white lighting applications I use 16 sets of 3 parallel LEDs (3P16S) in series.
I use Samsung LM301B LEDs.
which have a forward voltage from 2.5V to 2.9V so the total Vf ranges from 40V to 46.4V.
The maximum power requirement is 28 Watts per strip of 48 LEDs (2.9V x 200 mA x 48 LEDs).
So I select an HLG-40H-48B to power a single strip. This 48V driver has a range of 28.8V to 48V which will work with the min-max (40V-46.4V) range of possible forward voltages. 40 Watt is the smallest wattage driver in the HLG series.