An awesome write up and comparison (with charts and graphs) of many of the current bike tail light options on the market today.
“The following statistics were recorded for each light. I will be writing a separate post with more details about the testing process. Cost (MSRP and online price) Brightness at 0, 45, and 90 degrees from the front of the light source, flash patterns, battery life, mounting mechanisms (default included & available separately), ease of installation, ease of battery replacement, and special features. (A note on brightness: this value was measured at a distance away from the light, using a mechanism to help capture some of the diffused light due to different lens and LED setups. The values are useful for comparing the brightness of the lights to each other, but should not be used as a comparison against any external sources, because measurement techniques and setup will be different.)”
Read the full article here.