The Nitecore NU25 is an ultra lightweight headlamp you can wear comfortably for hours on end. There is a secondary high CRI LED which produces a warm 20-lumen beam and renders colors and details better than cool white outputs. Last but not least, The NU25 also features a secondary red LED for preserving night vision, map reading, searching for belongings in an emergency or in case you don't want to be easily seen. There are even three special modes for emergencies and signaling which is perfect for your Bug Out Bag or Survival Kit.