Temperature.

I have two 300 W LEDs & a 450 Watt LED. In my 2 x 4 grow tent. Temperatures are staying around 77 to 79°. I Changed the 450w and put in a 600w Temperatures are now around 85 to 89° My plants are standing up tall and strong. To be completely honest I see they're doing better in the warmer temperatures. This is my setup, I have two 4 inch booster fans at the bottom of my tent & two 8 inch Booster fans at the very top One coolmist humidifier in the middle.I Built a 2 foot table to fit inside the tent So my humidifier it's right underneath I cut a hole in the middle where the fan blows up. Some reason higher I can get my lights to the top of my tent the easier it is to cool it off that's why I built a table to lift the plants up because my lights are all the way at the top of the tent. Hope this helps because it took me a long time to figure all this out

Just like in tropical places !! I've been to 2 different countries and I've notice how poor people literally build their mini green houses in the jungle were temperatures are high af! 90+ ! But the difference in the medicine is so obvious when you taste it, feel it, smoke it, etc.. But yea some people like to persuade others into spending lots in air cooling systems and shit.. Some strains do love high temps and others not so much, but yea this is just my opinion!

plants adapt to there environments as long as there constant and dont do crazy changes. rather be a little higher then a little lower imo.

^^^consistency is important in maintaining slightly higher temps. Depending on the time of year I'm growing, my grow tent will cruise along at 87 degrees with the lights on. The plants did fine.

well if they are in veg most people don't understand plants like the temps in the 80 to 90f and they will grow a lot bigger and faster ! . but in late flower if the temps are hot you may have air e buds . keeps this in mind . with out co2 in late flower you need the temps around 75 or lower last 2 weeks of flowering . for high quality buds. if this is your personal smoke who gives a shit. keep doing what your doing no need to pump an ac and murder the electric bill . unless it goes over 90f then its time to take steps . in late flower.