This is my first grow and im growing Northern Light X Skunk and the flowering is 55 to 65 days, is that the time you change the lights to 12/12 and is this how long it will take for the flowers/buds will take to mature. If so when should I change the light over from the veg stage of 18/6 so I can maxximise my yeald. They have been under the light for 55 days now. Im just not sure what to do! There about 14 inches high now.