+1 for leaving the lights completely off. If you run lights during your cycle the algae bloom will be bad....very bad. You'll then proceed to fight it for a following 3-6 months as you have sporadic out breaks of hair algae, cyano
bacteria, and diatoms. As one species dies, it will release the nutrients back into the water and other species will take hold of them and grow. By leaving the lights off you deny any of them the ability to start up and allows you to remove the excess nutrients through water changes.
The whole premise behind a CUC is to keep up with the growth and keep it from getting out of hand. If you add a CUC after the tank is already in full bloom, you'll end up getting a CUC that's too big and after they clean it up, some will die and if you don't notice them, they will release nutrients back into the water through decomp and then your back to square one again.
Basically leave lights off, do water changes after cycle, add CUC slowly when cycle is finished.