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@gbj_tester
Now have a Moon Gem 2.0 on my TT bike. Weird rubber band mounting which seems like they forgot to change from front to rear, but that does mean it can be mounted on the saddle rails, which is handy for a race light. Brighter than a Knog Boomer straight on, but nowhere near the dispersion. Would not recommend for general use, but it's light, cheap and can be mounted on any standard saddle where it won't get knocked off by the pusher-off, so a decent choice for testers.