Un cheap, high quality , is the Supernova Airstream 2..
Several brightness settings with run times from 2.5 to 7 hours.
overdriven LED get heatsinks to dissipate the heat generated in making them brighter..

https://www.peterwhitecycles.com/supernovabat.php
available direct or at dealers with an account with this the distributor to US/Cdn shops.




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