is light touching your thermometer?

i have 2 that i use, one below the light which the light is touching reading at 98. then i got one above the plant but its under a hood so light is not touching it and reading is 80.

i think you should do this: get exhaust to blow out, i think 300 is fine for your space and get an a/c portable a close as you can to the growroom, then use some sort of intake to blow that cold air in. this is just my opinion.