Originally Posted by
canklecat
The most comprehensive light testing site may be
"We Test Lights", which is run by Light & Motion but appears to apply the same standards and methodology to all lights tested so they don't favor their own brand over others. They also test portable lights for other uses, including field video cameras, so they're more diverse than most bike light reviewers and appear to have more expertise.....
The fact that this website is run by Light & Motion means you are going to have to believe that one bike lamp manufacturer is going to honestly compare their lamps to another another brand. While this might be possible for the most part I believe this is counter-intuitive to how most people think. I would rather see comparisons done by someone without any commercial interests in selling the products they are reviewing.