Have you ever seen a houseplant that grows towards the sunlight? Imagine how plants grow in a hydroponic system if the light doesn't move. Adding a light mover to your system encourages bushy and uniform growth and allows you to make the most of your existing lights. The circular light mover is available four versions, the two arm version (shown in picture), the three equally spaced arm version, the four cross bar verion, and a five light version allowing a central light to be suspended between four lights. All versions allow the positioning of the lights to be extended and lowered. Extending the lights allows the light to reach further in a large growroom. Lowered lights can be raised as the plants grow, maintaining maximum transfer of light energy without burning the plants.