Darks, How close on temperature?

[cuivenion]

I'm using an oncooled ZWO ASI224 for DSO imaging. I did make a cooling system for it but it ended up misting the coma corrector so I've decided not to use it while imaging. I've decided to get as much image time as possible by using the cooling system to do darks later, but I have a fairly wide range of temperature for the uncooled light frames.

Obviously it would be best to get as close as possible in temperature for each light but pre processing would be much easier if the darks were within 0.5c of the lights, would this temperature difference be a bad idea?