Ehh idk how much equates to what in HPs, when it comes to mars hydro, if you looks the web site it tells you how many feet it covers go on that not the wattage. Personally I use 2 300w panels and have had a lot of success and love them as if I were to use HP's i would need to waste more money on cooling, as my problem isn't like a lot of people on here who need to warm up there cab cuz its too cold. Mine I have to cool because its too hot outside , so led my grow much more efficient