Bought an Airbike SL2 from Planet X for £125 about 10 days ago. Can’t say it’s quite as bright as a Hope Vision 4, or a Lupine Wilma on full blast, but it’s not far off. It also only cost £125!
It’s got a good flood to it, but it’s not ridiculous. Smooth spread on the beam pattern too, no real noticable “rings” or “spots” to it, just a bright centre that fades gradually to the edge of a pretty decent beam pattern.
Really impressed with it, and for less than half the price of a Hope Vision 4, I could get another to go on my head as well, and have a total of 1400 Lumens for £250!
The only thing is the handlebar bracket isn’t as good/convenient as a Lumicycle/Hope/Lupine mount. It’s still less of a faff than zipties though!