Everyone who cultivates seedlings wants the maximum. In our harsh northern climate, the sun is not enough for sure seed germination. An ultraviolet lamp comes to the rescue. But there is one Newance - at the stage of germination, the height of the lamp above the seedlings is 15 cm, with growth - 30 cm, and when flowering - 60 cm. Each time to outweigh the new clove at the desired height is not convenient. Therefore, a thought came to mind, which was embodied in the layout and in practice with the help of 3D printing.