The light fixture and bulbs are brand new. 6500k temp sitting about 1 inch above the tank rim. I forgot yo mention that the tank is 18" back to front. With the light sitting mor towards the back half of the tank. The dim area is more toward the front. If I move the light to the middle the front and back become dim.
You might try raising the fixture another inch or so and see if that helps the overall effect. With the light you have I hope you have CO2, if you decide to add an additional bulb/fixture CO2 will be a necessity.