Hi there,check out armytek(some neutral white options for colour renditions,more so being electrical) Also check some head lamps from Fenix and Nitecore.
If you do decide to go lithium cell(far better performance and run times,think 4/5 xAA kind of power but more compact 4.2v cell).
Have a search,read up regarding the safety side,good branded cells(keeppower/xtar/eagletac/samsung/LG/........etc) and charger(xtar/nitecore) as examples.
Good luck,check review section out,some armyteks can be used as flashlights too,so can be attached to head band,or removed when needed,that would be my start for a head lamp.
One example,check other versions too as 2013
http://www.candlepowerforums.com/vb...rmytek-Wizard-Pro-Prototype-Long-Term-Testing
Regards ven