I got a set of those £1.50 eBay lights a couple of months ago and I'm actually really impressed, they're pretty bright, certainly bright enough for just getting about on the relatively well lit streets of Bournemouth and Southampton. The only problems I've encountered are that the mounts are a bit crap and the rear light tends to turn itself on in my bag, but apart from that, for £5 posted they're pretty bitching!
I got a set of those £1.50 eBay lights a couple of months ago and I'm actually really impressed, they're pretty bright, certainly bright enough for just getting about on the relatively well lit streets of Bournemouth and Southampton. The only problems I've encountered are that the mounts are a bit crap and the rear light tends to turn itself on in my bag, but apart from that, for £5 posted they're pretty bitching!