If your lights are designed for flower, or even if they are full spectrum and you are in veg, get your lights up to 36" or Three feet, not 10 inches, not 18" not 2 feet, 3 full feet.
If they are a reflector type of led, or zero lens with an open array of LED's a little closer than 2 feet can be achieved in Flower, but in veg there is WAY too much red and your plants are going to burn and get
If you are using a LED fixture, and your plants are not fried or at least showing major deficiencies, your lights will not flower a plant to the fullest as it is way under powered.
One of those fixtures in plenty of light to veg, so turn one off. If one has a veg switch like a few do now, use it only and kill the red.
My lights are at 3 feet above and this is what my plants look like.
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I am using 110 watts over a 2x2 area with each fixture set to full spectrum. These were at 3 weeks from seed.