Paul, as a commuter myself, I've had my share of lights, pumps, etc fail and frankly, most mfgrs don't ask for a receipt or so. I've gotten replacement covers for blinkies that have fallen off (I commute on some rough fireroads as well as partly road), I've had bike pumps fail, etc. etc. I've had parts rust on my thule rack on my car and have had really good customer service from different companies, including Marwi, Blackburn, Thule. but I am honest, if I obviously have a blinkie that is a few years old, I don't try to claim I just bought it. On the other hand, LEDs should last more than 1 year and sometimes the warantee is just that...1 year. You should contact them and tell them you are a commuter and had so-and-so fail, tell them you don't have a receipt but be honest and explain that something like that should last longer than it did, commute or no commute.
FWIW, Blackburn has a lifetime warantee on their bike pumps and I've used it on a really old mtb pump that I had like forever, they replaced it with an equivalent model much to my surprise. I didn't expect it and was nicely surprised. I beat the piss out of it!
Jay
p.s. I've heard great reviews of the Planet Bike Super 7 red LED, it's supposedly really bright! It's not a cheap LED though in terms of a rear LED..
This message was edited by JayH on 11-28-07 @ 4:57 AM