Plasma grows light operates with light-emitting plasma bulbs, which work to mimic the sun as closely as possible. They are priced higher than other grow lights, but have benefits over traditional MH and HPS grow lights. Plasma grows lights emit a full spectrum, meaning they can grow a plant through both vegging and flowering. Plasma grows lights use half the energy of traditional MH and HPS grow lights while emitting the same amount of light, essentially cutting your energy bill in half. It also has a longer lifespan than the MH and HPS grow lights.