Ya mother you got some good questions there.. Natural darkness might be the fastest. But the question is, Faster at what? Red and far red Martin nights seem to be faster in producing buds or flower sites IMO. The internal clock of the plant I'm not so sure about.

Red 660nm sure it slows the plant down during the martrin nights but that's what will allow us to build fat buds when the HPS comes back on the next day. Then I want to use a r:fr ratio about half way through the flowering martin nights to speed back up the flowering. I'm sure natural darkness will be in the mix also.

Red Martin night work. You just got to get your plants night clock right. lower you blue light time until you start seeing good flowers with the martin nights going at the same time. I wouldn't worry about clock speed at this point. I would just make sure the plants are fully flowering with the martin nights with what ever combination of r:fr ratio you are using. For your specific plants to flower fully there is a certain amount of blue light time they need. I would start at 10 hours on and go from there. We are on 11 hours with a hps (witch is not as blue as what you are using) and the plant we use is also an early ripening plant. I think you have a bluer spectrum on time then we do so you might need your blue on time less. LOL:thumbsup: