As for the light cycle just keep posting pictures while your in the process of growing to see when is the right time. As for 20/4 for 2 weeks then 12/12 to induce flowering I'm pretty sure everyone will agree, thats a big no no. From seeding/veg stage you should use either 24/0 or 18/6 hours of light during the day, this should probably go for about 3 to 4 weeks depending on the size of your plants. Then go to 12/12 to induce flowering. About the CFLs I dont know to much about those so I cant really help on that matter but good luck :thumbsup: