The Orb is not bright enough for use inside urban environments at night. At day it's useless.
Also it 's a standard to have a red tail light and white front light, so orange in the middle would not help.

Look for example at the Orfos FlarePro, which i can recommend. 400lm, best side visibility, USB power and can be mounted everywhere without needing much volume.
orfos.us
kickstarter.com/projects/739603000/flare-pro-next-gen-light-for-cycling-hiking-and-ru

The old Orfos Flare was very well known too.
bikeforums.net/electronics-lighting-gadgets/1046604-new-orfos-tail-light-wow.html
bikeforums.net/electronics-lighting-gadgets/1012752-orfos-flare-throw-distance.html
bikeforums.net/electronics-lighting-gadgets/1106047-orfos-flarepro-bike-light-good-bad.html