No need for clarification - go back & read my post again - you'll notice I specifically said "in which ever direction you are travelling".
Think about this - in the daytime - have you ever had the need to back up and whilst backing up position the front wheel exactly right? If your answer to that question is yes, then you need the lights on the rear of the front tires.
We don't rock crawl here, so I can't answer your question based on personal experience, but from a general understanding of what you're up to, I believe you do, and my question was intended to guide you into making a decision, based on your experience.