Its several things i guess.. 1 is that the quality and wormanship of making this light is unreal. Also it is a true genuine 2600 lumens and not the over rated Lumens the Chinese slap on there junk.. Not sure if its worth a 1100.00 but i wanted it anyways..
Sounds like quite a light. I have around $400 invested in 3 lights. 2 small 200 lumen 18650 - one for the bars as a spot and one on wide on my helmet and one 1000 lumen 3x18650 as a wide beam on the bars. That gives more than enough light for the speeds a bike rides at. don't think I could justify $1100 worth of light, that would actually cost almost as much as my best bike and equal the cost of the other two combined.