Good enough for what? Good enough to germinate a plant and maybe grow it to 6 inches high, but you need a LOT MORE light than that to grow a big plant worth harvesting. 2x14watts no where near enough light to get more than a few grams dried off a plant. The bare minimum I would use to grow One single plant is 8 or 9 of those 14 watt bulbs. Better yet invest in a 250 watt High Pressure Sodium (HPS) bulb with remote ballast and grow 2 plants.