1. Headlights or flashlights are very important equipment, but the batteries must be removed to avoid corrosion when not in use.
2. A small number of head lamps are waterproof or even water-resistant. If you think waterproofing is very important, buy such waterproof bulbs, but it is best to be rain-proof, because the weather in the wild cannot be manipulated by yourself;
3. The headlamp holder needs to have a comfortable cushion, and some are like a pen hanging around the ear;
4. The switch of the lamp holder must be durable. Do not place it in the backpack, it will turn on itself, waste electricity or some situations will occur. The switch design of the lamp holder should preferably be a groove. snug, remove the bulb or remove the battery;
5. The light bulb is not durable for a long time, it is best to carry a spare light bulb to use, such as halogen krypton argon and other bulbs will generate heat and are brighter than vacuum bulbs (vacuumbulb), although the use will be high amperage and shorten the battery life, most The light bulb will have the amperage marked on the bottom, and a typical battery life is 4 amps/hour, which equals 8 hours for a 0.5 amp light bulb.
6. When buying, it is best to test the light in a dark place, the light should be white, the spotlight should be better, or the kind that can adjust the spotlight.
7. One way to test LEDs: generally three batteries are installed, two batteries are installed first, and the third one is short-circuited with a key evenly and lastingly (compared to headlights without a booster circuit), and the lighting The time is relatively long (the famous brand [AA] battery is about 30 hours), and it is ideal as a camp lamp (that is, used in a tent). Not waterproof).
6. If you are mountaineering at night, it is better to use the headlight of the bulb as the main light source, because the effective distance of its light is at least 10 meters (2 AA batteries), and there are 6~7 hours of normal Bright, and mostly rain-proof, you won't have to worry about taking two spare batteries for a night (don't forget to bring a spare flashlight to use when changing batteries).
