Ai ext rails

[kenconnect]

I'm looking to get a set of Ext rails but its not clear on the Ai site what size I need .. I have 3 Ai Hydra over my 220 and need them to 9" apart.
Thanks in advance
Ken

 

[edd]

assuming its a 72" tank, 4' should do it.

 

[duromega]

I have the exact same lighting over my 180, go with the 12" and the lights will be right in the center per 24" check out my tank thread and you will see what I mean

 

[kenconnect]

I have the exact same lighting over my 180, go with the 12" and the lights will be right in the center per 24" check out my tank thread and you will see what I mean

Is the rail it self 12"

 

[OrangeCountyCorals]

The rails they sell are 6" 12" and 18". You need 2 if you got 3 lights. If you get the 12" rail you can slide then onto the light more or less they go into the grooves and you tighten the set sqrew down to lock it in place.