In reply to mike123:
I've literally just bought some lights to replace my useless Lezyne ones (light output ok, but battery life insufficient).
For 100 quid roughly, check out the Gloworm Alpha... 1200 lumen, remote battery, replaceable lenses (4 beam patterns), fully waterproof (IPx7), 2.5 hours runtime at full power, multiple mounts included (bar, helmet, go-pro) and optional wireless remote and double size battery pack.
I was so impressed with my Alpha, I went and bought the Gloworm XCV after (Black Friday was still on) which is a 3400 lumen one. So I have the Alpha on my helmet (with battery in my jersey pocket) and the XCV on my bars, with a wireless remote to control the brightness of both of them. Cost me 300 euros in total (Black Friday helped - 100 for alpha, 200 for XSV) for many hours of 4600 lumens of remote controlled single-track lighting power. As well as adjusting the beam patterns, you can even user program the light levels. Pretty good value I'd say...
Post edited at 09:01