Induction Grow Lights are similar to fluorescents inasmuch as they are a glass tube with phosphors painted on the inside. When electrically activated, the phosphors emit light of different colors (wavelengths) depending on the phosphor chemistry.

The main difference is that fluorescents have electrodes inserted in the end of the tubes and induction lights do not. Induction lights are made in a continuous loop, have a coil wrapped around them in two places and the energy is magnetically delivered to the light's interior. This method of energy insertion is much more efficient than using electrodes that deteriorate over time thereby limiting the fluorescent's life to only a few thousand hours. Induction lights last for 70,000 hours at full brightness and 100,000 hours to 70% of full brightness. They cover the full spectrum and, therefore, can be used to grow a wide variety of plants.

These Inda-Gro induction lights will cover a 4 x 4 foot area (16 square feet) but the light distribution is not equal, with much more light directly under the light than out near the side edges of the 4 x 4 foot area. When using multiple Induction lights, we have found that setting them 3 feet apart gives a good distribution of light down a row of lights. They put out more heat than expected, especially right below the light. Each light draws 420 Watts of electricity and requires extra Red LEDs to improve flowering plant fruiting, like tomatoes. They sell for about $795 each.