Ive been looking at the airbike p4 from on-one, and it looks a little to good to be true, 200 lumens, 3 hour run time, helmet mountable and £60.

So has anyone had any experience of them?

thanks,

http://www.on-one-shop.co.uk/acatalog/info_LIABP4SLBK.html

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No experience, but the light housing looks exactly the same as my airbike p1 and that's too big/heavy for a comfortable helmet mount IMO.

Well if you think that's too good to be true, don't look at the DX light. 900 lmns and 50 quid.

I got one as my first light and I like it lots. It is pretty chunky for helmet mount but not ridiculous. Decent build quality, good performance, nice beam.