Hope they repair it at no cost or low cost.
If they don't ask them what type of led it uses and if it can be opened up by the user or a modder.
There are some modders at CandlePowerForums
that might be able to fix it for you and even upgrade with the latest and greatest leds...
I would be interested in knowing what type of leds it uses and also if it can be taken apart or if it is glued shut. Sometimes a little heat can open something that has been glued or sealed.
It could also be the driver....
If it can be opened and they let you know the type of led it uses...I would be interested in buying it from you. I have had several flashlights modded by
user "vinhnguyen54" over at CandlePowerForums
. Some of the flashlights that he has modded cost over $2,000. The mods he did to one of my lights made it brighter and also render colors better. He also bumps the current in some lights so he is familiar with many different drivers used for leds.
Also if they don't warranty it or fix it at low cost ask them how much they sell you led driver and leds for. They might can sell them to you at a good price. Hope it is just the led but it could be a led driver.
Check that the dimmer switch on your bike is working also.