Constant Current vs Constant Voltage Dimmable LED Drivers
Sorry, Geremy, but you've misunderstood. The module you're looking at will simply not work well with the dimmer turned down. It will ALWAYS try to drive 1400 mA through your LEDs. If the input voltage is too low (because of your dimmer) it will get very unhappy and may do strange things. 

The 17 to 29 volt range just means that it will successfully drive 1400 mA through an LED string when the voltage needed to produce that current varies between 17 and 29 volts. This voltage difference could be produced by differing numbers of LEDs in a string, or using the same number of LEDs, but of different colors.