lighting time change?

[smokers]

my 3 ladies have been on 12 12 for nearly 5 weeks and looking really nice my problem though is i need to change my dark period to 15 hours of dark will this cause problems ?
any info would be much appreciated
:smokin:

[smokers]

plenty of views no answers ????
anybody???????????????
:smokin:

[smokers]

its cool i found the answer lol
:smokin:

[redtails]

So what'd you find out? I'd say it's perfectly cool to do 9/15 as nature's not perfectly 12/12, you just will have 3 hrs less of plant growth a day...