Sorry Jim,

I did not mean to be so mean to you. The only opinion I gave you was to read a book. The answer I gave you was based on facts, as current science see's it. I did not mean to put words in your mouth about speeding things up, but felt the example that some people have tried or are using a short day technique was the only useful info from radically changing the photoperiod.

To answer your question:
1) it will not double the grow time....it just won't grow and it won't double in size.
2) it will do more then nothing, see #3
3) it will fuck up your girls and probably cause hermies.

I read and experiment, it works out pretty good for me. It's how I know about shorten grow days. I've lived my life by a simple philosiphy, try to learn something new everyday, and in my 79 years I've learned quite abit. Problem now is trying to remember it.

Sorry again, but as Sarah Louise points out the world is run by grumpy old men....it just that most of them don't grow pot.