First time flowering

Hi there
First i would like to thank all you guys who responded to my plant problem posts; they were incredibly helpful and I'm proud to say I have a very healthy and happy bunch of plants that are ready to be put into flower... My questions now are 1) do I change the light cycle right away from 18:6 to 12:12, or should I do it gradually (like start with 19:5, then 20:4 etc)? 2) we are using 3 pt GH series nutes. It has amounts for "transiton to bloom". When, and for how long, should I follow this feeding schedule as it relates to the light cycle? 3) when should I be giving "full bloom" nutes? 4) I am using a 600w digital ballist with mh during veg. I have a hps bulb to put in for flowering , when should I switch the bulb? Thank u all so much for your help.

change the light cycle straight away to 12/12 and switch the globe at or around the same time. probably star the transition to bloom as soon as you do this too. just search " transition to bloom" on google there are plenty of results

Just flip the lights don't worry about easing them into it. Continue to give veg nutrients for two weeks into flower If you have two bulbs MH and HPS that's cool you can switch them out every two weeks. I didnt notice much difference between the two.

I guess you transition formula would be used for the first two weeks of flower.