What wattage recommended for flowering?

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light intensity wont change your photoperiod, Changing to a 12 on 12 off cycle will make them flower. The intensity of your lights will effect plant health and growth speed/mass

The 2700s will be a better spectrum for flowering i believe but i use HPS so not 100% sure.

Tarks: flowering is caused by a combination of things: plant diet, photo period and light frequency/color. If you want to force flowering you can change the plants diet form one high in nitrogen to one lower in nitrogen and higher in phosphorus and potassium. You need to shorten the photo period from 16 on and 8 off to 12/12 and go from the blue grow lights of 5,00K to 6,500K they vegged under to red 2,700K flowering lights. The combination of those three things will force flowering. For a non-commercial personal MMJ grower wattage isn't really that important. I hope that helps. Hank