It is important to know that there is no universal rule on how far you should place your lamp from your plants. Although minor adjustments make a huge difference, multiple details are to be considered. First of all, manufacturers conceive their grow lamps in different ways, their power ratings are different, and the lenses and bulbs used are different. The best way to get an adequate distance between your succulent plants and your grow light is to consider the model’s user manual. Besides, you can also consider your plants’ height and adjust the grow lamp above from it as it grows.