4 clones 3-26 "weddingcake" front two

hi guys.how high is too high for my phlizon led1500 watt light. I'm having a lot of trouble with these new lights. there is fans in the news light but for some reason that hot air is aimed down towards plants instead up and out of the back like I assumed after reading they are fan cooled? It was imposible to keep my box cooled to the temp ive been keeping them, 70ish. i proceeded to take plants out of box. Made a new floor setup thinking it would be easy to keep them around desired temp if they were not in the old ventilated box. Still fighting this problem but seems like i can only keep them at 70 w the ac on nonstop in that room. Deff wasnt planning on running ac for next three months straight ya know . do i raise the light even higher or look for recipe. If i raise em, how high is too high? If i return them, what led lights under 200 dont blast hot air at your plants?