Grumpy_Mike thanks for stopping in! I've read your input on many other posts and found your advice to be very helpful! As I mentioned, the attached sketch isn't the complete circuit. The 5 LED's shown are only meant to represent the RGB LED strip that I'll be using. Here's the internal wiring for the RGB strip:
Each channel can draw 20mA, so your maximum total current draw per color channel is 20mA x #sections. All together I'm going to have 72 of these color channels, each drawing anywhere from 20mA to 200mA. When I get a little further along I'm going to dig deeper into how to keep the lines clean from noise and balance it all properly, but right now I'm stuck on how to efficiently use a pwm constant-current sink LED driver to switch a pnp transistor to switch an N-Channel mosfet to turn the lights on and off real fast. 