[Controlling lights with Galaxy RIO]

I was looking for something along those lines for myself and found a 12v   2 channel arduino relay online at the link below , It has a jumper for high or low level trigger  with a trigger current of 5mA 

there are 4 ,8, and 12 way boards also if you need more outputs

 

https://www.ebay.co.uk/itm/DC-12V-2-Channel-Relay-Module-with-Optocoupler-H-L-Level-Triger-for-Arduino-E1W9/123316846044?epid=2215872635&hash=item1cb641bddc:g:TrwAAOSwAwtbdrUF