Light Time ? Help

i would like to know about changing the lights when the plants stat to flower is this necessary and if so what wattage etc. thanks

your plant wont flower unless the light cycle is turned to 12 hours on 12 hours off except autflower that flowers regardless of the light cycle

What Mr.green said, and you want as much light as you can afford/fit without having heat issues. Peace

This page explains the light cycle.

This page explains lighting, such as wattage, bulbs, etc.