İstanbul experiences significant seasonal variation in the perceived humidity.
The muggier period of the year lasts for 3.0 months, from June 15 to September 15, during which time the comfort level is muggy, oppressive, or miserable at least 12% of the time. The muggiest day of the year is August 4, with muggy conditions 48% of the time.
The least muggy day of the year is December 10, when muggy conditions are essentially unheard of.
this is a tough time to be finishing out the flowering plants.. I would like to make some more suggestions.
Do you think you could take some pictures with the HPS lighting off and some natural or regular lighting? That would help out getting an idea of what we could modify
this is good info to have... Next time you grow and plan on flowering this time of the year, you could get a strain that can deal with high humidity. during the rest of the year it looks like you may be OK