The top of the leafs are already dead. You can chop these tops off.Can these leaves be recovered? Humidity is not a problem. It can either be heat or some nutes messing up.. PH of soil is 6.8. RH is 59%
Temp at base of pots is 27 deg C. I am using CFLs and lamps are 2 inch above top of plant. This happened only to the top... so it seems to be the heat.