The holder fulfilled without question its purpose. However, the question that remains is who, how long? This is now the third bracket. The first broke for no apparent reason at a normal bike without being a special stress would have been exposed. The second, as the MTB tipped over from the state. It So is just a matter of time before this will bless the temporal.
Why Sigma Sport simply makes it not ready, for its high-quality lighting sets that are also designed for hard off-road trails to provide correspondingly high quality brackets? I for one would like to spend once a few euros more for a stable CNC machined aluminum bracket.
Conclusion: Lie down on a stock so you do not suddenly stands in the dark.