Temperature Fluctuation?

[YELLOWLT1]

What would be an acceptable temperature fluctuation? The temperature on my tank fluctuates from 79.9 to 81.5. I have tried to stabilize this, but it is extremely difficult with my lights. I do have fans on the lights and in the sump. Is a 1.5 temperature fluc. considered a problem or would this be an acceptable range?

 

[dustybrannum]

that seems pretty exceptable to me, mine goes from 78 or so up to around 85 right now, still working on keeping it more steady by adding fans and raising my lights BTW there are no animals in my tank right now.

 

[Brisc0]

mine does about the same and my corals show no signs of stress. I shift from 80.1 to 81.5 or so.