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The bucket plant and the 10 seedlings in cups are under 2 cf tubes and 2 cf bulbs. So just plugged into a wall outlet, nothing fancy, uses barely any energy, and doesn't cost much to buy. Downside is I can only do 4 adult plants that way, without sacrificing yield. It's the right kind of light, and they enjoy it, but it could definitely be brighter, especially during flowering.