Coral QT Light Help

[saltwaterswiftie]

I want to run either a 5g or 10g QT tank for some new zoas. This would be my first coral. I was wondering if a 5g would be too small, I have seen other people try this. I have both tanks already but I do not want to buy more flow and I have a small pump that would work of the 5g but not as well for the 10g.

Is there a good rule of thumb for the light requirements needs? I want to get a light as cheap as possible. Would something like this work?
My DT has a 59W fluvial sea light.

 

[nothing_fancy]

Zoas IMO are really forgiving of light but you probably wont get the spectrum you want out of that light. I am personally not on board with QT'ing coral, I'll take the beating for that if necessary, just dip if you want and go right in the tank with zoa. For what it's worth I have some zoas that are invasive to my scape and are basically indestructible. Solid water chemistry is all you need IMO and a basic light that claims to provide full spectrum, sand bed, low par, all good.