New Grower Need Friends

I would say to be safe 4 a plant so that would be 16 in total with 8 y splitters and 8 clip on fixtures.

Lighting should be used as a coverage and not per plant necessarily. Just a little lighting info*
CFL lighting (to include T5, T8, and T12) = 65 watts per square foot.
HID (MH, CMH, or HPS) = 50 watts per square foot.
LED (there are some exceptions to this and it is a complex situation, but in general) = 35 watts per square foot.