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http://www.darkerside.org/2013/11/luxos-iq2-u-dynamo-headlight-review/
"[Edit, April 2014: the new Luxos IQ2 model has a permanently connected wire, which removes the risk of water ingress, but also prevents you using a cable extension if you’ve got a longer-than-normal-bike length from mount to handlebar."
Review of the updated version..
http://www.darkerside.org/2014/04/review-update-monkii-luxos-iq2/"Instead of attaching via a plug and socket arrangement for the remote switch/USB charger, the latest IQ2s now have a permanent connection with a (short) fixed-length wire. This is grand if you only use the IQ2 on a conventional bike, but on recumbents or cargo bikes you now can’t stick an extension cable between the lamp and switch. So you can’t have the switch on your handlebars."
hippy-
One dead, one external power Garmin and a light switch.
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The cable to the switch is quite long, I have the light mounted on the standard brake hole and the cable is wrapped around my steerer twice to take up the slack.
One thing worth noting is that you can't charge if you're powering the light, so night riding (something I'd imagine you'll do a lot of on endurance races) will have to be prepared for with day-time charging. Not particularly difficult to arrange, but worth bearing in mind.
fussballclub
yoshy
Nothing better then cheap and cheery as chips fork mounted Luxos.