Being dogmatic is still my nature. And I continue to hate traffic-light colors. However, I do like the traffic-light elements of Summize. They display product ratings with multi-color bars. In the example 35 products associated with Flipper more often receive a top rating than products which contain the brightest name in the universe.
Even better: the grey-scale variant and sparklines. Sparklines visualize the number of ratings per month. The color represents the mean of all ratings for a month. Distinguishing different values is much easier with the grey-scale variant.