Originally Posted by
rfomenko
Review of the Best Bicycle Tail Lights in 2012 « Stack Exchange Bicycles Blog
As I said, it's useless for DAYTIME riding. And it's not my opinion, just a fact. The original poster actually asked for a good DAYTIME light and Reflex is clearly not because its low power LED. Cygolite Hotshot (which I have) is barely adequate and it's over 20 times brighter according to the chart. Serfas is just as bright as Hotshot except it has a wide lens. I also have a new Hotshot 80 (i.e. 80 lumens) and it's significantly brighter than the original and Serfas & is actually very suitable for riding in sunlight. And yes, I also use two rear lights for the reasons you stated.
I agree too, the Reflex is completely useless in the daytime, it's barely useful at night! You need at least 60 lumens to be effective during the daytime and the Reflex has about 20, but it does have a nifty reflector that again is useless during the day.
The more tail lights one can have the better able motorists will see you. I've been doing the same thing that Chris Pringles says he does for a good 30 years and that's using at least two tail lights with the brightest one on steady and the others on flash. I like to put my 2 flashing ones on my stays and the steady one on my seat bag or on my seat post, this forms sort of a triangle. Combine that effect with ankle reflectors and whatever other reflectors you have and you should be noticed by all but a drunk. But get the brightest tail light you can afford initially then later add to it as money becomes available.
This is an interesting tail light, it's cheap, and it claims high lumen output but I would venture a guess that the actual output is about 1/2 of the rated lumens but at the claim 168 halved to 84 lumens this light should show up in daylight and it got high reviews by a lot of reviewers; see:
http://www.amazon.com/Blitzu-Recharg...est+tail+light