The fixture has room for 3 strips. It comes with one and then I bought the other two extra. They stick on the fixture there is an area for them on there. Yes you need to get the right power cord as well for it all this can be ordered from Modular LED on the canreef site. Martin is really good to deal with just tell him what you want and he will tell you what you need to order for it and the total cost.
He is really good at replying back through email too.
Go to their site and take a look at what they all have there. I was going to go with a stunner strip but glad I did not and went with this instead. Somuch nicer that is mounted up and out of the way on the tank.
I think it puts out perfect light for this size of tank too.
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Bugsy.... 
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