More options here:
Blackburn Central 300
Blackburn Central 650
Blackburn Central 700
Blackburn Central 800
All basically the same light body/mount, just different brightness. Discontinued; the 300 is around £25 on fleabay, the others are harder to find but around £50-£60
Features:
<25%, <75%, 75%+ battery indicator
1 * removeable 18650 battery (included, 2400 mAh, feel free to replace with a stronger one)
IP65
Micro-usb charging (0.5A - external chargers can typically do 1A)
Go-Pro mount style, mount provided
Brightness:
300 lumen/150/80/pulse 80/strobe 80 (real ANSI-FL1 lumens, not fake Chinese lumens)
650/400/200/pulse 150/strobe 150
700/400/200/pulse 150/strobe 150
800/400/200/pulse 150/strobe 150
Review here notes good beam but dodgy mount if your handle bars are not straight.
https://www.pedelecs.co.uk/forum/thread ... ght.29654/