Temp swings....problem???

Lights on = 78-80f

lights of = 53-58f

ismthis too low at night

Yes too low at night.

Yup. I had it that low at night too on my last gro. Seemed like the plant took longer to mature. But I also overfertilized as well.

if i remember right.... temperature swings like this can cause new leaf growth to yellow slightly down the middle... this discoloration passes as the leaf matures but it is a sign the temp swings are too high???

Can someone confirm or deny this for me please, supporting info would be cool too.

10-20 degrees is good. your max grow temps should be 80 unless using co2. so if your avg day temp is 75, your night temp should be 55-65... but if its running at 80 i wouldnt let it get less than 60 in there

no yellowing has to do about something wrong in photosynthesis and chlorophyl production either by a deficiency (Nitrogen especially) or light or pH and other factors as well! what you should expect as a sign of temp variation IMO is stem 'purpling'! Careful this also can indicate P deficiency during flowering. Welcome to RIU!