If growing 12/12 from seed

[oldmac]

Ligthing at 12/12 with seedlings will result in thin scraggly plants with a pretty reduced yield. That's why no one does it as a rule.

Really nice, simple post, too bad it's wrong info.

Most sativa's come from equatorial regions, where the normal photoperiod is close to 12/12. They NORMALLY grow that way...think about it!

If your're getting stretched spindly plants indoors under lights, your problem is not enough light not the photoperiod.

Indica's seem to give mixed results to 12/12 from seed, but worth the experiment if you like playing around.