See a friend of mine tried this a few yeard ago and i don't remember it having any affect on flowering time or quality only the yeild was decreased from the previous 12/12, but it wasn't my operation and I wasn't really involved so maybe I'm wrong and the flowering time was shortened. I know the quality was the same as his other harvests because I bought and smoked plenty of it seemed the same, and i definitely remember him saying he got less than usual but saved a ton on electric so it worked out ok. I don't know it was a while ago and i guess the details are kind of fuzzy.
Anyway I'm definitely interested in it. i've got some going into flowering in about a month under a 1000k and i got DESTROYED by the electric co. last time around, ended up paying around $2000 in just electric by the time I was finished, and didn't recoup anyways near that much. This time i vegged under flouros and am going to start out at 12/12 in flower and knock it back to 10/14 or so after a few weeks. Any less than that makes me a little nervous because I HAVE to come out ahead on $ this time around or I'm fucked, so I'm going to be a little cautious.