It’s just one of those design items that the led community in general has willfully neglected. There is a certain obsession with light fixtures appearing “sleek” and it is ABSOLUTELY to a fault. The amount of blue pollution created by hanging a reef light is cutting off ones nose to spite their face. It DOMINATES whatever room the tank is in, and for most people Makes for a generally unpleasant living experience. Solutions are light shields which would be entirely DIY. A fixture sized shield to cut down on lateral scatter will drastically reduce the fixtures usable light spread, and a tank sized canopy defeats the “sleek tiny led fixture over a rimless tank” aesthetic. You simply have to pick your poison. Either accept the blue bomb in the room to stay with the sleek modern look, or abandon that modern look and put a more classic looking canopy over the tank. That would completely encapsulate the light spill to the sides and make the room look a lot more normal