how much light is needed to flower 3 plants in a medium size fish tank with lots of reflective paper (mylar?)? the lights would be no more than a few cm away from the plants. The plants will have a total of about 80w and about 4000 lumens during vegitative stage. for the flowering stage the plan is a total of 140w and 8,000 lumens. because the light placement will be only a few cm away from the plants is it still necessary to purchase aditional lights?