The "multi-die under one dome" LED allow you several options you don't get with normal single color LEDs. (the rebel tri-star has the same options, but due to the orientation of the LEDs themselves, the choices for optic lens aren't quite narrow enough for most saber usage)

You can, with some wiring tweaks, mix the 3 colors in various combinations (based on resistors). The awesome purples that folks get are based on this setup.

You can also setup a rotary switch or similar with varied resistances and cycle through color presets.

If you had a computer controlled version of the rotary switch above, you could have it cycle automatically, limited only by the circuit itself.

While only the CF has the flash on clash feature built in, you could, for instance:

Mix the Red and Blue dies together to get a purple, and then with a momentary switch, manually activate the GREEN die to simulate blade lockup or similar, which would shift the blade color towards WHITE while the button was held down.

Keep in mind that unless you're using the 10W LEDENGIN RGBA (a 4 die LED I believe), you're not going to get quite as much brightness from any ONE of the individual dies as you might from a dedicated single color LED.

The 3W RGB LEDs people often use are ROUGHLY 1Watt per die. This is less bright than a typical single color LED of the current generation, but it wasn't that long ago when 1W was *bright*

Still, you trade a little raw brightness for increased flexiblity. You can always get more than one LED/heatsink and swap them out as you like.