The image reaper told me about these a couple of months ago and i went out and bought 3. i flowered 3 plants under them and i ended up getting 2 ounces a plant in a very small organic closet grow. For rating the bulbs i would say they are pretty good when left on for an hour or so the smell of raw marijuana goes almost completly away but as soon as the lights go off the smell creeps back into my room a little bit especially as i got towards the end of flowering but other then that they are worth buying at least one for your grow