Who needs hi-viz when you run lights like this?
Hi-viz has a major drawback, it won't make you visible if the sun is behind you from the drivers point of view. A good and bright light however, may do.
I wear very little hi-viz and very little reflectives. Why? Because they have limitations. Reflectives require a source of light to hit them to reflect back. This means any cars pulling out of a side road will not see anything from your reflectives, better to use lights.
Hi-viz is best effective when the visibility conditions are low, but in these situations you can be just as visible with a good set of lights. If everyone is wearing hi-viz, will you stand out more or less if you wear it or black/white?