Typically with Meanwell, first characters which are usually letters, is the Model.
The second set of numbers is Indeed a rough idea of its wattage capabilities.
If there is a C in front of the next set of numbers, it's a Constant CURRENT driver.
Without the C, is a constant voltage driver.
The numbers occurring after the C or without it determine the output current or voltage of the driver.
The last letters, A/B/AB describe it's dimming capabilities. Whether it's an internal, in driver potentiometer turned by removing a plug and using a Phillips screwdriver. B meaning it has dimming leads you will attach your own potentiometer to for remote dimming. AB Indicates having both options.
On some models, like the XLG, this is an L/M/H meaning low medium or high which correlates to the amount of current threshold the driver is capable of putting out.
It is a wide range for each, meaning 350mA-1400/1400-2800/2800-4200.(these figures are probably not correct, but just an example)
Hope that helps get you some sort of direction!
