Budding/Flowering stage question about experimenting with lighting?

I was wondering if it was a quantitative thing or a qualitative thing that plants need for lighting to induce budding.
By this i mean does a plant need PERFECT EQUAL lighting for example : 14/14 or 15/15 or hell maybe 24/24 (quality of equalization and balance of lighting)

Or does it ALWAYS Need 12/12 ??? (specific numbers)