Relay to control 2 outputs

[Micah Chetrit]

Hey everyone.
I have an off season project to make LED rods and put them on the robot and get them to light up in patterns (I am also a programmer). Being that there are going to be 4 rods, I thought I could save space and money by using only two Spike relays, attaching two Positive wires to it and using a common ground that isn't run through a relay.
If I recall right, this has been used for solenoids (? might be wrong). In my mind it should work, is there any reason it shouldn't?
Secondly, is it legal to control two outputs with one controller? (haven't read rules for a long time, I forgot many of them)

Thanks in advance,
Micah