LED grow lights need to be kept at an appropriate distance from the plants - keep them too near the plant and you risk burning it and keep it too near and then you would risk not providing adequate light to the plant (particularly the lower portions). Hence you need to ensure that you keep the lights hung at just the right distance. The most basic way to do this is known as ‘back of the hand test’. Place your hand on top of the plant and keep moving the light slowly downwards till you begin to feel hot and then move it significantly upwards. The light, as a rule of thumb, needs to be farther from the plant during the growth phase buy nearer during the flowering phase. The distance should be adjusted till you come to the perfect position.