JRB has added a couple of head lights to its store....
The super small Petzl has been a favorite UL item, under 1 oz incl batteries, of ours for years, since the first came out ...
The Black Diamond 90 is a ton of capability and light all for 2.2 oz including 3 AAA batteries. It is a great light for those actually night hiking or with significant night activities.
http://www.jacksrbetter.com/miscellaneous/ Scroll down.
Pan