[antonye]

I put Halford's own brand blue-tint bulbs in when one of mine went. I'd put these in the car and they do seem to produce a better quality (if that's the right word) of light than the more yellow bulbs.

They were about a pound more than ordinary bulbs so I thought it was worth the gamble and I think it has helped.

There's also the blue tinge to the light which is quite noticeable at a distance, and if that helps to get you noticed more on the bike by half-asleep car drivers, then that's a bonus too.