These lamps allow you to grow whatever you want indoors. They emit very little heat, have a good light spectrum (5500K) and consume very little power. The advantage is that they fit in normal lamp holders. Remember they are about 9 inches long. You can use these bulbs in both the vegetative growth phase of your plant and in the flowering phase. In an ideal world, you should turn off the 5500K bulbs when your plants start to flower, with a 26W, 2700K CFL Compact Fluorescent grow light that plugs