its not a matter of the light getting there, that isnt the issue. You are absolutely right that the light will reflect out to fill the area that is not directly light. My concern was more for the aesthetics of the tank. Having a flat front canopy on a curved front tank will look quite strange . . . especially since the stand will be curved as well. Even more so, I would not like the idea of having water exposed with no cover. All kinds of things could fall in there.