does it matter how many watts the light bulb is. i have a 15 watt florescent light set up. do i need to go higher to produce good growing. and is cool white good enuff to grow buds on the plant. basically what im trying to say is can i use the type of lighting until i get ready to harvest my plant. or do i need to go up a knoch on the wattage. and would some one explain what does watts mean