Ohhh, I just had a neat idea!
I think I'll add a FET before AND after the 7A bec, and I'll make sure that the one that goes after the BEC is connected to a PWM-capable pin on the teensy. That way I can drive either "normal" LED strings or WS2811-based led strings/strips with with the same hilt electronics. I'll use the blade identifier resistor to switch to the correct control logic. The standard string blade will need a resistor to drop the voltage down from 5.5 volts though. (Should be something like 1.1 Ohms for 100 leds.) The formula for the resistor would be (5.5 - led forward voltage) / (LED forward current * number of LEDs).
I'm currently thinking that I'll build one PL9823 blade, one based on WS2811 strips, and one traditional one, based on some small blue LEDs. (Although, it seems that ranking LEDs based on total light output is nearly impossible as the standard measurement is mcd, which depends on the spread of light, and every LED has a different light distribution pattern... Wish they would just publish lumens per watt...)