On Thu, 28 Feb 2013 10:41:38 +0000, Andy Champ
wrote:

On 27/02/2013 23:50, Grimly Curmudgeon wrote:
My headlamp strobes on low power, but not on high. Something to beware
of when viewing rotating machinery. I reckon it's around 40Hz.

Which make is it? - so we all know not to buy one...

One of these
http://www.ebay.co.uk/itm/170875795055
If it weren't for that, I'd buy another one, it's an excellent lamp,
only spoiled by the usual cost-cutting measures, like a nasty hinge.