Adjust height and intensity to meet DLI requirements. Have the light high enough to provide coverage for both plants. The way to tell if a light is too close is to hold your the back of your hand at the tips of the plant. If you can feel the heat from the LED on the back of your hand, then the light is too close.
It’s going to take a lot of light to flower 2 plants, assuming you intend to flower them indoors . ~200 watts per plant is a general rule-of-thumb. What is the true wattage of your LED?