was truly shocked when I realised how much it's possible to waste spend on a light ie. more than my my whole 'best bike' cost to put together
I must admit I've thought it quite amusing when I'm using my almost-£200 Diablo on my commuting hack that probably isn't worth a lot more than that
Yes it's expensive, but I use it a lot (that's my excuse anyway). My old Vistalite halogens cost me £170, but they lasted me 10 years so isn't really that bad I don't think. If the Diablo proves that reliable (I hope it does...) then I reckon that's a fair investment. Not sure I could justify the likes of £800 Lupines though!
As to whether anybody NEEDS these sorts of lights - I used to ride the same roads with a normal "Ever-Ready-type" lamp with the high powered halogen bulb (the ones with the red cases - 2W or something weren't they?), but much more slowly that I can now with modern lights. So not essential, but I know which one I prefer.