I have always wondered about the visibility of all of my reflective gear. I wear a reflective vest to which I have added an extension with 2 strips of Reflexite to hang further down. On the particular bike I was riding this morning I have two 8-LED truck/trailer marker lights with Reflex lenses which are reflectors even when the lights are off. This morning I was leaving about the same time as my wife so I asked her to let me get a block or two ahead then note how visible I was both with and without the lights on. When I talked to her later she said, "The vest and lights were very visible, but you never turned the lights off." I had. I guess the Reflex lenses work pretty well if she could not tell the difference! With only 8 LEDs each the lights are not nearly as bright as the 54 LED truck brake light on my other commuter, but since they are in a straight line and I have two side by side, they form a quite visible light. The Reflex lenses are an extra benefit. These lights only draw something like .035 amps (verfied with an amp meter) so the two together still draw almost nothing.