I over looked that tid bit.
I couldn't imagine it speeding things up more than a few days which over the course of a year, say like 6 flower cycles minus 3 or 4 days per cycle will only give you an extra 18-24 days which isn't enough to squeeze in an extra crop. I just don't see an advantage other than saving a little money on power cost or lowering temps a little.
When folks say the plants flower earlier I'm assuming they meant the plant starts forming buds at 1 week of 12/12 versus 2 weeks? Are we talking just seed runs or clone runs, because clones tend to start flower in a week or week and a half of 12/12 so a little quicker than the seed run.
I just don't see a plant under the glr yielding the same as a plant ran under a more traditional lighting schedule and every single grow I've seen on forums where the grower was using glr strengthens my assumption.
I remember
@Torontoke had a thread years ago but I can't remember if he still uses the glr but I was not impressed with the overall growth under that light schedule.