First as an outdoor headlight must have the following three important performance indicators Waterproofness In outdoor camping on foot or other nighttime work, it is difficult to avoid rain. Therefore, the headlights must be waterproof. Otherwise, a rain or flooding will cause the circuit short circuit to extinguish, or the lightening and darkening will cause safety hazards in the dark. In the purchase of the headlights, it is necessary to see if there is a waterproof mark, and it must be more than IXP3 waterproof rating, the larger the number, the better the waterproof performance (the waterproof rating is no longer recounted here). Resistance to falling A well-performing headlight must be resistant to impact (impact resistance). The general test method is to fall freely at a height of 2 meters without any damage. In outdoor sports, it may also be due to phenomena such as wearing too loose and falling down. If the shell is cracked when it falls, the battery falls off, or the internal circuit fails, it is a terrible thing to look for the battery that is missing in the dark. Therefore, such a headlight must be unsafe, so it is also necessary to look at the purchase. Whether there is anti-fall logo, or ask the owner of the head lamp's resistance to fall. cold resistance Mainly for outdoor activities in northern regions and high altitude areas, especially the split-type battery box headlights, if poor quality PVC wire headlights are used, it is very likely that the wire surface will become hard and brittle due to the cold. Caused the breakage of the internal core. I remember that when I first saw the CCTV torch at the Mount Everest, I had also experienced camera failure because of the extremely low temperature caused by cracked contacts. Therefore, if you need to use outdoor headlights at low temperatures, you must pay extra attention. The cold-resistant design of the product. The second is about the headlight's lighting efficiency Light source The brightness of any lighting product depends mainly on the light source, which is commonly known as the light bulb. The most common light source in general outdoor headlights is LED or xenon light bulb. The main advantage of LED is energy saving and longevity, but the disadvantage is low brightness penetration. Poor power. The main advantages of xenon bulbs are long range, strong penetration, and disadvantages are relative power consumption and short lamp life. With the rapid advancement of technology, LED technology has become more and more mature, high-power LED has gradually become the mainstream, color temperature is also close to the xenon bulb 4000K-4500K, but relatively high cost. Circuit design unilateral evaluation of a lamp's brightness or life time is meaningless, the same bulb size of the same current theoretical brightness is the same, unless the light cup or lens design problems, determine whether a headlight energy Mainly looking at circuit design, efficient circuit design reduces power consumption, which means that the same brightness of the same battery will take longer. Material and workmanship A high-quality headlight must be made of high-quality materials. Currently, the high-end headlights are mostly made of PC/ABS. The main advantage is that they are strong and impact resistant, and the thickness of 0.8MM thickness can exceed 1.5MM. The thickness of poor quality plastic material. This greatly reduces the weight of the headlight itself, most of the mobile phone shell using this material. In addition headband selection, high-quality headband elasticity, feel comfortable, sweat-breathable, even if you wear for a long time do not think Dizzy and uncomfortable, the headlights on the market now have a trademark jacquard on the headband. Most of these headbands are well-selected, but most of them are nylon materials, and they are hard to feel and have poor elasticity. They are easy to wear and dizzy. In general, the exquisite headlights will mostly focus on material selection. Therefore, when choosing a headlight, it depends on how the work is done. Is it convenient to install the battery? In addition to these elements, the structural design of the headlights should not only consider whether the structure is reasonable and reliable, but also whether the lighting angle is adjusted flexibly and reliably when the headlights are on the head. Whether the power switch is easy to operate and will not fit in the backpack Inadvertently opened, had a friend on foot, to the headlights at night when he took out from his backpack and found that the headlights were turned on, the original switch design in the most cutting-edge like an egg, so put in a backpack It is very easy to open the bag because of the movement of the backpack during the exercise. When the battery is used in the evening, it is found that the battery has consumed half of the battery. This is also very important to note. Relationship between light quality and lumen According to the purpose of using different things with a limited amount of energy, the headlights can be lit and managed in different ways: The standard headlights have a "direct" relationship between output and lighting, and some technology headlights have a built-in lighting management system. The relationship between the output energy and the illumination distance: The distance between the illumination distance and the output energy has a direct relationship, but mainly depends on the shape of the beam. In fact, the same brightness output, the distance between the two sides will vary with the beam shape. For example, a 100 lumen light output can project a very wide beam at a distance of 50 meters, but it can also project a very narrow beam at a distance of 200 meters. Tips: 1. Brightness output and battery life are closely related. They have a growing relationship (unless the battery capacity increases, it also means that the headlights increase in weight). 2. The shape of the beam affects the distance the light shines. Two 100 lumen output (light, beam) Outdoor headlight brand recommendation The cable was founded by Fernand Petzl in 1930. It is a famous outdoor equipment brand in France. It may also be regarded as the most famous lighting brand in the country. The brand's lamps are strong and durable, and the overall quality is high. The brand has been seeking a balance between safety, functionality, and light comfort, and has created products that focus on the user's convenience. 2Black Diamond Black Diamond Founded in 1957, the Black Diamond brand is a professional manufacturer of outdoor sporting goods. Over the past 59 years, Black Diamond has grown from a manual workshop relying on anvils and hammers into a multinational company with modern production facilities in Europe, America and even the world. Black Diamond is an employee-owned company that combines design, production, and testing. It constantly strives to improve and innovate climbing and skiing products. It also actively promotes environmental protection. It has occupied the field of professional climbing and ski equipment for many years. Industry leader position. 3 Shanrui Shanrui Photoelectric Co., Ltd. is a professional company that researches, develops, manufactures and sells portable mobile lighting products. Since its sale in China in 2007, Shanrui products have won the trust and love of customers with its unique design, advanced technology, reliable quality and excellent service. At present, there are three series of leisure life, professional outdoor and field work, including more than 20 mature products including headlights, camp lights, bicycle lights, flashlights, signal lights and emergency lights. Occupy the majority of the domestic outdoor lighting market, has become the first brand of domestic and outdoor lighting. Statement: [Articles and pictures transferred from the Internet, the copyright belongs to the author, this point of view does not represent the views of this platform. If you feel infringing, please contact us to delete it. This website does not assume any legal responsibility. 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1 French PETZL climbing cable 
How to choose outdoor headlights, it is enough to read this one