First grow

I've started the growdiary after the pre-flowering/stretch phase, they stopped growing at 65cm both of them. I had some luck I guess since they are not close genetically. I have a little grow space and I had some struggle to control humidity through this phase, I've bought an dehumidifier that helped me. The temperature is another problem since my house gets really hot on warm days. Since this is my first grow, I decided to not apply any stress techniques and only learn how the plant grow naturally. Of course during the previous stages I've noticed where I could apply LST but I didn't want at all. I'm using BioBizz nutes just because the gifts I've received from grow shop, I can't do a review on them since I don't have anything to compare but so far all seems fine. Just a minor nitrogen deficiency that I handle in no time but it was my fault. The lights were purely a leap of faith, I had read great reviews about this LEDs from a startup Spanish company and I took the risk since they were cheaper comparing to other bigger companies. I have a 250W hps lamp, that I can't use at all due to the heat.