Theoretically it is a 30+ watt driver, but in the real world is limited to 20-25W. They come with the current sense resistors set to 750 mA (not 1 amp). I modded one for the rated 1.2A output and it quickly went into thermal shutdown. If you parallel the sense resistors with a 1 ohm resistor, you get around 950 mA out, and it seems to work fine.
You need to check the voltage rating of the electrolytic cap on the board. I have seen boards with 35V and 25V caps. Some of the boards have a small ceramic cap of unknown voltage rating that is connected between the +Vin and SW pin (mostfet switch output) of the chip… it can probably be removed.
If you are driving the board with DC power in (and are careful not to reverse the power supply polarity) you can bypass those 4 diodes in the input bridge rectifier circuit and get better efficiency out of the board (those diodes eat around 1W at 1 amp). It also gives you around 1V more headroom on the input voltage requirement.
I used one of these drivers in my Waldmann lighted magnifier retrofit and am running around 24 watts into it. See Waldmann Omnivue Lighted Magnifier Nichia 219 Retrofit