Andslite Tejas Shakti LED Rechargable Torch. Best for forest Ranger 

Lighting by JAPANESE / GERMAN LEDs.
• High Power focused reflector for long distance coverage.
• Strong and break resistant housing.
• Easy ON / OFF Mechanical & Rocker Switches.
• Battery- 3.7v/6000 mah li-ion
• Led Power- 5W Torch & 2W Emergency Light
• Distance coverage - 1+ km Focus
• Charging time - 7-8 hours.
• Backup time - 6+ hours - Torch, 10+ hours - Emergency Light