[quote]"It is also well understood that MJ grows the best under 24hr or similar lengths of time."

Nothing personal, but that is Bullshit...It is not widely known that it is best to have 24 hours of light.
Here is the thing...Plants do not receive 24 hours light anywhere...If you do not give them time to rest, they will hermie from stress. It is a proven factoid that more feminized plants are produced by using shorter photoperiods...you want Male plants? Use the longest photoperiod.

somewhere on this site...I did a thread on feminized seeds...which still require correct growing methods and shorter photoperiod's in order to remain female.*

the only time I even use a total of 18 hours is for MUM's
For vegging I use 15-16 hours until I drop times to 12/12. Keep in mined the longest day of the year is approximately 15 hours long...that should tell you something.

*this info came from an excerpt of a study done at Dutch passion (the real seedbank).

good luck Peace