I think there should be a distinction between lights "to see" or "to be seen". If you are riding closed trails, and it is sufficient for you to see then I don't see an issue. However, "to be seen" is another issue. I would have someone video you riding at a distance (in sunlight) from the rear and see if your light is the first thing you notice (without looking for it). You may find that your rear light (power/patterns) are woefully inadequate.