Side visibility is okay, but it is indirect (you can see white diffused light but not the LED source from 90 degrees. From 45 degrees not bad at all. I found the set on Amazon for $17. If you found for $10, please post the link! I have owned a dozen tail lights and about 20 headlights over the past decade and this is the best deal for the money (not the best light set, but the best deal on a light set). The headlight is bright enough for limited riding as a headlight and you can see the road with it but if you ride at night all of the time you will want two of these or something brighter. I use mine to supplement day blinking with my Edelux 2 headlight.