Hi Robbie
I’ve just adding STROBON’s to my 250 Quad, red/green at rear on heartbeat and blue strobe at front.
Because the current drain on these varies as the LEDs glow up/down and peaks at about 1A when they flash I was determined NOT to power them from anything connected to flight controls.
I am using a tiny sBEC ( Mini BEC V2 Voltage Regulator (3.3V,5V,12V) - Unmanned Tech UK FPV Shop ) solely to power the STROBONS and it works a treat.
Also because the 0V on this is the same as battery 0v you can link a RC channel to the S pad on the STROBONS for control / synchronising and it will not affect the power usage.
Hope this helps
Steve 