I think when the light meter gets straightened out u should use it and check your par readings so we can see what you are actually getting at your sand bed. And to the left and right of the light pad. The coverage may Look good but the valuable light area for your coral maybe much smaller than it looks. I know ai suggest 6 units of my tank and I am only using 3 but I also know my corals need to be placed in specific areas under those lights. I am waiting for the Vegas and I will add 2 more to my existing 3. I'm not going to try and sell my 3 and buy all Vegas but I would like a couple to expand my coverage and add the color of the vega. I would love to see some real world par numbers from your tank I you ever use the light meter.