Your light is too flat. At first glance I thought this was a ring light.
In order to get surface texture to show up, the light needs to be at a much steeper angle. Try moving one so it's coming in from the side, and the other closer to the camera (or leave it at 20 degrees.) The side light will bring out the texture, and the front light will fill in shadows so it's not too contrasty. Move the front light in and out until you get the effect you want.