Well, that depends.. size of tank and what do you plan on keepin?? Read the literature that came with the light. Im sure either in the box or on it it says what ° the optics are. Take a picture of the underside of the light for us.
It going to be a coral tank. It is 24x24x24. I looked at all the paperwork and it only has how to set it up and how to set up the wifi. It doesn't even show the lens in the contents that come in the box.