Some additional info would help. The hight of the light is not as important as the temp at the top of the canopy. But it does not look like heat from light. Do you have a moisture gauge? If not , get one (they are cheep). They are not super accurate but they will help. looks to me like a watering issue. U said every other watering... what are the intervals between watering in days? What nutes are you using? besides flipping the lights (i assume), what have you done to start the flowering cycle?