i run 2700k 300 wt cfl 3 of them...temp 78 and im wk 3 of flowering....the k rating needs to be lowere...and need intake outake fans maybe even a plant fan......circulate air and problem should dissappear...Low 80s is fine for veg and you didn't say how old your plants are. If you are in flower you want it cooler than that, and you need 2700k lights, and more of them.
lol, his temp is 83-85, within the range you gave.Ideal temp for veg is 75-85. Ideal for flowering is 77-81. Cool it off asap.