thanks for the feedback. I was debating between the TN4A HI and TN4A, but thought the TN4A woul be better. I was wondering if the spill would be too annoying for cyclists coming toward me on the bike path.
Thrunite recommended a different 18650 light (TN12) for this purpose, but I go through the Li rechargables in a couple years as I don't like to baby batteries. That is why I was thinking the TN4A would be a great bike light.