I bought also one with 300w i tried it a few days but my temps were always above 30°c, and i had to go back to the 150 that a friend of mine lended me , i am enjoying the upgrade from the mars hydro i used to have the only problem is this leafs on the gorila cookies on my green gelato everything going good
I had the same thing happen but I thought it was going well most of early flower until it did not stop reaching over 90F due to the light being too close to the ceiling.
It was about 85F but did not realize I got greedy with high wattage and was too late to correct. I am almost at harvest and have lights dimmed at 60% and using winter outside air to keep cool, still see 90F on the probe often times.
When I used a 130w ufo in same tent, the temps where perfect in summer time enviorment. The space above light matters, if it is insufficient, the hot air will droop to the canopy.
I am done with this tent. Using 6-8 feet tall space next time. Still 2x2 though. 65-130 watts. Thought this expirience would be relevant to yours.