A 'tactical light' is not what the original question asked.

And what I meant by praising Dougs light, is that it has the features of a perfect light. One of those items that just keeps getting better. Even the clip is a world beater; I've stoppped losing things off my keyring.

Wilko headlamp:
http://www.wilko.com/camping-equipment-and-essentials/wilko-3-led-headtorch/invt/0408494

qjs