Here's a video I shot to show the effectiveness of the Bike BrightZ at night. Watch it and judge for yourself.
Just for clarification, I mounted two lights on the bike in the video, one on the left and one on the right of my rear rack, pointed at an angle to the rear. If I was to do this permanently, I think I would have used two of the Bike BrightZ red flashing LEDS rather than a yellow and green as shown in the video.
Bike BrightZ can be ordered online for $19.99 each with free shipping in US and Canada.
Here's what I found from my testing evaluation on adult and kids' bicycles (note: Bike BrightZ provided me with samples for my testing and evaluation - I did not purchase these nor receive compensation for this review)...
Fairly easy to install.
Package comes complete with batteries.
Easy to operate.
Different LED colors available.
Multiple flashing patterns (or steady).
Kids love them - it's easy to get them to use them.
The unit can rub against down tubes and scratch paint when grit gets between unit and the bicycle tubes.
Since it mounts low, it could be obscured by mud/muck/sand/grit/grime.
It might not fit flush on more radical designed frames or curvy frames or smaller kids' bikes.
I am of the opinion that any visual enhancement in low light or dark conditions, especially as a bicycle commuter, is a good thing. This said, this product would be a good thing to consider in your "visibility toolbox" along with a headlight and flashing rear red LED or reflector (per many states' laws). Additional reflectors and/or lights are also beneficial. I would avoid the colors other than red, and especially not combine the red and blue Bike BrightZ, as to avoid drivers thinking you're posing as a cop.
As for kids' use of this product, there is a coolness factor that they really enjoy which makes it easier to get them to turn them on. (Note: the kids sampling this were 5-7 years-old and were not actually riding in the streets at night).
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