There are some out there I just can't find the link. Try to goggle for it and you will find many free some for a few bucks. I remember one site that had plans for PVC versions too.

As for the light to nutrients yes that is correct. They will take about 60 day's or more then any other strain to finish.

It's worth the effort and time. Drop a few short timers so you can have some smoke and not want to harvest early.