I use to use cfl. When in flowering I used one bulb for 2700 k light and the other one I used one bulb for 6500 k. At first I used only the 2700 k light but my buds stretched unbelievably so I added the 6500 k. I may have this backwards..I trylt hope not tho.
Good luck on your grow. I'm glad I learned growing using cfl lights. It was not expenxive and I learned lots.
Since I live in a mobile home I now use t5 lights. I love them.
Welcome to the forum.