ive been googling all day long and i think that yes

i really f****d up on the PH! going to start watering at 6.5~

when should i lower the PH and how gradually should i lower it?

about the light hanging low, i did have the light bout 1,2 meters above b4 but it seemed that my seedlings streched alot.. 2 of them stretched really far.. so i decided to try to lower the HPS, atm it seems fine and temp by the seedlings are 25-27C messured in the shadow of some cardboard at the same hight as the seedlings. i checked temp yesterday "in the sun", no shade, and it showed 32C im not rly sure wut to think bout this? wich is the correct messurment? wut shud i trust?