Tikka XP headtorch from Petzl has a single light source that addresses multiple lighting needs. This is a compact and lightweight unit coming in under 100g including the batteries. It has a single compartment housing the batteries and the LED's. It also has a battery level warning light that tells you when the batteries are 70% and 90% discharged.

Wait but there is more, it is water resistant for all-weather use, has a wide angle lens made of impact resistant polycarbonate, a strobe mode. It operates on 3 AAA/LR03 batteries (which are included). Weighs : 95 g including batteries and has a 3-year guarantee.

* 3 lighting levels : maximum, optimum, economic
* flood beam for sharp, proximity lighting (Wide Angle lens)
* spot beam shines up to 35 meters
* Boost mode : shines 50 meters for 20 seconds.

Tech Specs:
Maximum Mode - 35m 60hrs
Optimum Mode - 27m 80hrs
Economy Mode - 18m 120hrs
Boost Mode - 50m
Light Output 40 Lumes