Would it be legal/possible?

[Mr V]

Originally Posted by tomy

So it would be legal to wire it directly to the PD Board

Yes if the gauge of the wire used meets the minimum for the breaker feeding the circuit, or if you provide additional circuit protection appropriate for the gauge of wire in the circuit.

Of course connecting it only to the PDP you'll be stuck with only Red, Blue, Green, the color that will result from driving two of those colors at 100% duty cycle or white if you connect all three grounds.

Now there is nothing that says you can't use a micro controller and some transistors to create a custom circuit to very the duty cycle of the separate colors.