You’d be surprised how dark it is when you get up early in the morning to hike to the birding areas.  These headlamps look a bit silly but they are extremely practical as they keep your hands free.  They are also lightweight and easy to pack.  You may want to consider a waterproof one if you will be there in the rainy season.  Please note this is my Amazon affiliate link.  You pay the same whether you use my link or not but I do appreciate your support.