@theatrus - Before I go and re-wire all this...would this be the correct setup? Resistors are 500 ohm. Instead of going to ground as in the diagram, each cathode would go back to a DB9 pin.
Or would this be a better solution (the connector on the bottom is the DB9...uses 200 ohm resistors, and the two lines to ground are just to complete the circuit, wouldn't need to be on the actual board, correct?):
Regardless of which is better/more correct, either would allow for each LED to be individually switched on/off via the 'equipment' page in Reef-Pi? (I'm not using an ADJ...these are status only)
#2 wont work, as the first LED switched on will present as a short to ground. When the outlet is switched “on”, it presents as a very low resistance path to ground.