If you have any issues whatsoever with this fixture (eg. expected light output, coral reactions, usability, ANYTHING)  have no worries. You are welcome to return for a FULL REFUND or I will work with you very easily to help you upgrade to the brightness you want. This LED technology in these custom color temperature Flood lights are beyond any other LED technologies available. Very efficient and loved by Reef Tanks everywhere!

SHIMMER: If you are looking for the nice shimmer that Metal Halides give off this is one of the only type of LEDs you can use and still achieve that goal. Since the light output comes from a single point it gives a beautiful shimmer. 

With the 120 degree light output this light provides incredible light for any size tank. I would suggest using TWO of these 75-90 gallon tank. Could move up to 3 after that... gives off a great 6,500K color temperature.  

Incredible feedback from customers about Growth and Color of their Corals!
Much less Heat, Evaporation, and Electricity!