Yeah that first number is always maximum watts, and the second number is the upper end of the constant current range — 185 watts max, and a range of I believe 32 - 48 volts — 185 watts, 48 volts. I’m still not great at explaining what the constant current range actually means, but it’s a range of voltages that the driver will work at. Don’t quote me on the actual CCR of the driver because I don’t have the datasheet handy. What this means, is that with this driver you can run any amount of lights as long as the sum of those lights max wattages stays below 185 (you can do more but lose the ability to run them at full power), and the strips operate at any voltage within the constant current range. I’ve never built with one of the milliamp number drivers for wiring in series but I think you just match the combined current of all the strips to the right number at the end of the driver, just like with parallel you use the voltage to determine the driver. Looks like you can get drivers for wiring in series with dimmers too, so it’s really all preference, but if you get that 48a driver you have to wire in parallel.