i'm not sure about outdoor tom . a way a friend of mine uses and he showed to me was to look at the tric'S and to see if they where starting to bend over . when the plants come to the end of its cycle the tric's will do this . i have never used a 30x to judge any of my plants in the past ( only ever used the hairs and the bent tric's and i have always had good results) . what i would say is if ur plant is showing 25% cloudly and the rest clear u have at least 14 days maybe even 20 days left to go depending on the strain . one thing i am interested in is u have then outdoors how do u controll the light??