Constant Current Technology--led module

Here is a link to the datasheets of the led light I have know.
RGB Controller.
http://www.ledmodulelight.com/led-modules-rgb4.html

CCT maintains consistent current levels, eliminating the line loss and forward voltage drop issues common in many LED modules / LED lighting systems.
CCT provides uniform light output throughout the entire installation, while also preventing damage from overdriving of the LEDs.
CCT means no more complex wiring precedure, delicate load balancing, finicky power supply setting or lot-specific LED selection.