Hello
So in my opinion it doesnt matter whether it's an auto or a photo plant, leaves handle heat no matter what. Different strains can handle very high intensity and others not so much.
But typically if you're using an led, don't get closer than 15 inches when it's grown. Young veg keep it around 23-28 inches. Older veg/flowering around 18-20 inches. But like mentioned they can usually handle 15 and not get burned .
HID lights are reallygonna vary based on wattage, they run hot! I wouldn't go closer than 13 inches and don't hang farther than 15-30 inches based on high and low watts.👍