In reply to mattc:
After trawling bikeradar's "which lights?" threads for about a year, I got these:-
http://www.candb-seen.co.uk/bikehead-lights/
Got 2 1200 Lumen fronts, helmet thing so one goes on the lid for off-roading, plus the 600 Lm rear (recommended - a solid red beam taillight is much better on dark roads with dangerous traffic than a little winky flashing LED), and two splitter 'Y' cables, so I could run all three from the same battery pack (usually don't - it was meant for two only) - all for little over 100squid, and I'm the brightest non-motorised thing on the road.
they are the mutt's for my likes, and tough too - couple of weeks ago I cycled into a canal in the dark,. Clipped into pedals, proper submerged, flaling about underwater. Ineresting light effects with total internal reflection on the underside of the canal's surface. Got everything out, and the lights still work brilliantly.
iPhone's dead though.