Found a site that reviews lights. Link to site that features a beam shot, but here's what they have to say:

Tested: From 28 Nov. 2011

My favourite taillamp: Very well visible while not being too bright. Compared to the Toplight Line plus: side visibility is better, medium to short distance visibility is better because of the larger illuminating area and very long distance visibility (>100 m) is comparable. On the wallshot the lightoutput does not look impressive, but it puts the light where it's needed, better than any other taillamp I tested so far. So the light it puts out is used very efficiently... Recommended.

Review in progress