I have a 4X3 tent and 2 vivosun VS 1000 lights with Samsung LED's with 4 plants in the tent i measured the PPFD on the plants. My two that are flowering are thriving but my 2little girls are only getting 300-400 PPFD while the big girls are getting 900 PPFD. the 2 little girls are in veg. big girls are flowering. Should I make a change of some sort? Any help would be great.