Will it matter that I switched from 400 mh to hps 600 4 weeks into flower.
Depends on space because it will definatley increase heat in your grow room
Thanks I have that just thinking about stress . Different color light and higher watts.
It should be fine I just went from 250 to 400 on some seedlings so I raised it and temperature at plant height is the same as at 250w setting, about 70 degrees
Edit: …and your flowering plants luv the hps too!