Poor yeilds

Hello guys have a continuous problem I keep getting poor yells my setup is now in a concrete shed. I had a condensation problem and solved that also I was only giving 10 r 11 hours light during flowering. Would these problems result in a terrible crop? Also is temperature during dark hours essential??? Any help appreciated ya

What lights are you using? temps? and yes reducing the light period below 12 hours reduces yield.

Using 400w hps. The night time temp in the shed is lonely say 10 degrees inside the tent it stays round 15 degrees??

Thats a bit cold 10 for dark period, try running the lights at night. need pics.

I'm gonna try that on the next crop I didn't want to cos it might look hot in the eye in the sky but fuck it at this stage. Any recommendations on a strain wi short flowering time , industrial plant maybe? I'll upload pics soon about 5 weeks flowering.