All of the pits in MM4BRI have the glowing blue textures which help know where they are when the lights go out. Then, there's this one. It's kinda weird that the most potentially risky pit in the map doesn't have any sort of indication of being there in the dark.
I suggest placing the glowing blue textures in the areas marked by Time Stoppers, with small 3d floor pieces above them so that there's no actual space cut in those areas. The floor pipes that go dim in the darkness would also be good where the floor texture surrounding this pit is.