Heat stress ? Or stress from switching to hps from mh

Ok so I just put three of my ladies into my flower tent about a week ago.i noticed that the leafs where crinkling and turning real light yellow almost white in some spots. my light is only about a foot and half from my plants. I'm running two inline boosters with one pulling out my veg tent thru the ducting. As it meets the other tent the air is greeted with another inline booster then thru my second light and out the other side. I have a side vent and inline booster pulling air from outside for co2 reasons. I don't know if its heat stress because the tent is slightly open with a circulation fan on the plants. Also when I stick my arm in there my arm is very comfortable. My nute regiment is the go box from General organics. Here's some pics if anyone could help it would be so appreciated
 

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