Silk few weeks I have this light in operation. First bought at the hardware store a version, cable with plug and switch, then assembled the whole and attached to the window. First surprise very bright and purple. One should not look directly into the lamp, hurts the eyes and it is almost the same as during electric welding. The lamp is made up of several individual lamps in shades of blue and two red together. I have with us not as the green thumb that I let my wife. My wife says that the leaves of the plants are vigorous, grow more flowers and a total of the plants are more vigorous than the neighboring no longer gotten the light of the lamp. It will be interesting how the greenhouse plants will react to the light, that later again, it is too early and too cold for plants in a cold greenhouse. A nice side effect, we use the lamp as a television lighting, it is sufficient for our small living room to illuminate sufficient shade of the lamp acts here very pleasant.