Can someone explain to me why am not getting any smell???

I have 40 plants in 3rd week of flower and no smell.

and on 12 / 12, someone told me to go to 8 hours on and then 16 off, anyone have any input on this.
sccrocks Reviewed by sccrocks on . No or Very Little Bud Smell Can someone explain to me why am not getting any smell??? I have 40 plants in 3rd week of flower and no smell. and on 12 / 12, someone told me to go to 8 hours on and then 16 off, anyone have any input on this. Rating: 5