The P600 effectively replaces a conventional 400w HPS grow light while only consuming 92 watts of actual power, while giving your plants 100% usable light that is perfectly tuned to create maximum photosynthetic response. The P600 is our most popular light thanks to it's blend of power and affordability. It's perfectly suited in all situations from closet grows to a full scale larger operation using multiple units to achieve full coverage. Herb or vegetable gardens will also excel under the P600.