Originally Posted by rudedog40
I would say that unless you have the recommended lighting for the species of coral you are QTing, it will most likely have harmful effects, if not kill it, because it didn't have the light it needed during the typical 3-4 week QT period.
If you don't qt your corals then you can risk infecting your entire display. It is well worth the money to get lighting for a small, it can be a two gallon qt tank, just for corals.