hydroponic lights

using LED and florescent indoor, six hole unit using three 1-2 staggered. planted in January, I think they are almost ready to start budding. how many hours of light should I be giving to start flowering.

I'm new to this whole indoor growing thing but would like to share my vision on a small build I have and see what advice is out there. I'm thinking about setting up 2 - 600w hps in a vertical manner with 4 - 3 gallon buckets at each quadrant around the light. The space I have available is...