So, if I don't want to spend to much on a (multiple) MOS for this project, and I am only looking to pass less than 200mA through any one group of led's, the 2P2222 'old fashioned' transistor will be OK, yes?
also, you mentioned voltage across the emitter/collector (transistor impedance?) I would then need to discount the 5V power in by that voltage to tune the resistors for the led's, yes?
Thanks to all for this help...