First, the brand introduction Founded in 2007, ITECORE is a self-owned brand of Guangzhou Ximai Innovation Technology Co., Ltd., and NITECORE is the core of light. Since the company founded the brand, it has always adhered to the corporate philosophy of “not only innovation†to meet the high standards of users, focusing on the development of outdoor lighting products such as LED lighting, chargers and batteries, and is widely used in military and police law enforcement and industry. Homework, outdoor adventure, daily use and more. At present, NITECORE has become the standard equipment for military, police and law enforcement personnel in many countries around the world, and is also a necessary lighting tool for professional outdoor sports enthusiasts in various countries. Sales volume is far ahead in the same industry, and it is exported to more than 100 countries and regions such as America, Europe, Middle East and Oceania. Knight Cole's product features mainly include the following points, which are integrated into every series and style of its products: ⶠLightweight and sturdy integrated barrel; ⷠHigh performance circuit and optical performance; ⸠Easy to use dual switch operation interface; ⹠Powerful red LED design. Second, product information NITECORE Knight Cole's products, I am no stranger, as early as September 2017 I have already measured the NITECORE Knight Cole LA10 CRI mini camp lamp, the performance and characteristics of its lighting products have a clearer I know and understand, and left a very deep brand impression. The NITECORE Knightco product for this evaluation is the NU25 lightweight headlight in the NU (Buffalo Light Series) for its lighting products. By comparison, it can be seen that the packaging of ITECORE products has formed a relatively mature family style, the yellow and black color is very attractive, and you can catch your eye at first sight. Maximum output 360 lumens Maximum range 81 m Maximum light intensity 1650 cd Life time 160 h 0 m / 6.66 d LED CREE XP-G2 S3 LED Light Cup Type Orange Cup Battery rechargeable lithium battery Special mode beacon, SOS Color temperature type white light, high color source Body length 55.5 mm / 2.18 in Head diameter 55 mm / 2.16 in Product weight 28 g / 0.98 oz Third, the details show The outer packaging is removed, and the product list is as follows: NU25×1, USB charging cable ×1, headlight belt ×1, manual ×1. Let's take a look at this headlight strip. The whole is a very elastic elastic band. The "NITECORE" English nameplate is printed on the mottled decorative pattern. The color contrast is strong and the recognition is high. The inner side of the belt, that is, the side without pattern, a silicone sweat guide strip with a length of about 25CM is a bright spot. Some people say that this is anti-slip effect. In fact, it is not entirely true. Its main function is to guide sweat to two places. Prevents sweat from flowing into the eyes during exercise. Among the various rechargeable lighting products, the USB-Android plug charging cable is almost uniformly used, and the versatility is strong. For this headlight, even if the internal power of the headlight is exhausted, you can continue to work as long as you connect the USB mobile power supply such as the charging treasure. This insignificant little detail of the magic gluing makes me confident in the follow-up products of NITECORE Knight Cole, because only NITECORE Knight Cole noticed the storage considerations of the wire harness from the various lighting products currently in contact with it. I hope other brands can pay attention to this detail. The product manual is more refined, the front and back are in both Chinese and English, and the individual agrees that the design of the manual is exquisite and compact, and the content is detailed. The NU25 headlight is a small rectangular parallelepiped with a slightly trapezoidal chamfer design on the front, a concave decorative strip and a metal-like brushing process, giving a simple and imperfect sense of exquisiteness. Through static observation, it is found that the functional division of the entire lamp body is relatively clear and conforms to the habit of human body use. The front of the lamp body is a light-emitting area, and the main light source and the auxiliary light source are adjacent to each other but do not interfere with each other; the top of the lamp body is a double-switch zone, and the white light and the red light button are juxtaposed, and the right and left hands can be easily operated; the charging body is under the lamp body, and is dustproof and waterproof. Cover with rubber cover. After the actual measurement, the NU25 lamp weighs about 25 grams, the card seat weighs about 3.5 grams, the strap weighs about 24.8 grams, and the total weight is about 53 grams. The length and width are about 50mm × 30mm, and all the data is basically consistent with the official data, and the feather level is positioned accurately. Close-up of the dust-proof water-repellent cover, you can see that there is a thin protruding edge around the edge of the rubber cover. Do not underestimate it. The dust-proof and waterproof is mainly realized by it. In this product of NITECORE, it is very unique to hide the power indicator function in the switch button, which can prompt the remaining battery power. Just press the R button and it will not be loose. In the main light switch, the power status will be notified in the form of a red light flashing: the red light flashes 3 times, which means the power is greater than 50%; the red light flashes 2 times, representing the power is less than 50. %; red light flashes once, representing less than 10% of electricity; In addition, in the normal charging state, the red indicator light is always on; when fully charged, the indicator light turns green. Because the battery was fully charged when it was handed, it took less than an hour to recharge it. According to the official instructions, the charging time is about 2 hours in the state of loss, this time efficiency is still commendable, and more BT is, when the power is full, the standby time is about 1 year......... .... Fourth, the adjustment and wearing of the strap In the product description of the NU25, there is no hint for the installation operation of the strap. Here, I will make a demonstration. First of all, the NU25 lamp holder is not as nicked as the other headlight products, which is convenient for the strap to be worn. Instead, a honeycomb-like hollow plastic piece is designed at the position where the strap is threaded. It is disconnected, the strap is put in and out from this disconnected position, and the installation is completed after straightening and straightening. (Note that the position of the sweat strip should be in the top of the head) The adjustment of the strap is achieved by the two plastic buckles above. The right hand holds the buckle with the English inscription, and the left strap is pulled horizontally by the left hand, and the entire strap will become longer, correspondingly The head circumference is increased; the left and right hands respectively press and hold a plastic buckle to pull horizontally on both sides to reduce the size of the head circumference, and the straps are correspondingly shortened. Finally, look at the connection between the lamp holder and the lamp body. It not only functions as a fixed main lamp body, but the combination of the two also enables the lamp body to change the illumination angle. There are 5 card tooth files. The position can be adjusted in the range of 60 degrees. Five, close-range lighting test The light source of the main lamp adopts a CREE XP-G2 S3 white LED lamp bead. The CREE lamp bead products of the United States should be familiar to everyone. Most of the lighting products on the market today use this brand. Based on the XP-G, the XP-G2 uses a more precise and advanced optical design, and the light efficiency ratio is increased by 20%. Under the close-range lighting test with NU25, you can see that the biggest difference between low brightness and high brightness is the range of floodlight (the picture on the left is low and the right is highlighted), because the main light is used. Orange peel reflector. At present, the more common lighting products on the market are reflective cups and orange cups, called orange peeling cups. The electroplating process makes the reflective surface a rugged orange-like texture with a thickness of 6 filaments. 8 filaments can make the light diffusely reflected and then merge into a spot; while the smoothing reflector is more efficient, the middle spot is more condensed, the long-range time cup has a slight advantage, and the orange cup is the middle. The light spot is relatively uniform, the floodlight is relatively strong, and it is not easy to appear a halo in the floodlight area. The main highlight of the NU25 is also the important feature of the official main push. It is the three light sources, which are white light main light, red light auxiliary light and white light auxiliary light. The three light sources can be quickly switched at any time. This white auxiliary light is not a normal LED, but a high color rendering illuminator with CRI ≥ 90. The degree to which the light source appears to the color of the object is called color rendering, that is, the degree of color fidelity. The light source with high color rendering has better color reproduction. The color we see is closer to the natural primary color, and the color rendering is low. The light source's reproduction of the color is poor, and the color deviation we see is also large. The red light is used by many outdoor people, especially in Europe and the United States, because many countries in Europe and America are popular hunting sports. The human retina contains two kinds of photosensitive tissues: pyramidal cells, rod cells, pyramidal cells to distinguish colors, and rod cells to distinguish contours. The reason why people can produce color is precisely because of the pyramidal cells that are present in the retina. Many animals only have rod cells or only few pyramidal cells, which cause color insensitivity or even no color perception, especially for red light. When hunting at night, you can use the red light to sweep unscrupulously to make the prey unconscious. , greatly improving the efficiency of hunting. On the other hand, the eye is adaptable to the surrounding environment - when the illumination color changes, the eye needs an adaptive adjustment process to adapt. Adaptation is divided into two types: dark adaptation and bright adaptation. Dark adaptation is a process from light to dark, which takes a long time. Bright adaptation is a process from dark to bright, which takes a short time. When we use white light for outdoor activities, when the line of sight changes from bright to dark, it is dark adaptation, it takes a long time, there will be a short "blindness", and red light takes a short time in dark adaptation, very good The situation avoids the short-term “blindness†problem, allowing us to better treat our eyes and maintain good night vision when we are at night. The greatest convenience of NU25 in daily life is to liberate your hands, especially when you need to work with both hands. I believe that many people have encountered it in one hand. Especially nowadays, everyone is accustomed to holding a mobile phone as a lighting source. The wide shape of the mobile phone reduces the stability of the grip, so the user loses his hand and breaks the mobile phone. It’s not uncommon to see things. Sixth, long-range luminescence test In order to verify the long-distance illuminating effect of NU25, I selected a local river with a width of more than 200 meters. One person observed and photographed on the shore, and one person operated the NU25 illuminating sign on the other side. The white light, red light, SOS and letter of NU25 respectively. The benchmark functions were observed and tested. Through actual tests, it is found that white light has the highest recognition in this distance and in such dark environment, and because it is floodlight, no matter which angle is observed, the light-emitting point can be found at first sight, which really adds to the wild survival sign. Great confidence. In contrast, the red light is only 13 lumens, the luminous intensity is only 4 candelas, and it is affected by the surrounding ambient light, so the test effect is greatly reduced, and the degree of eye-catching is greatly reduced. Seven, evaluation review The results of the assessment are important, but the study of the evaluation products is the perpetual power of every tester. NITECORE Knight Cole's NU25 Bull Headlights are designed with the patented real-time power reminder function. This has already killed many similar products. The three-source switching design gives users more scenes. Use the choice, all-weather response is more calm; featherweight lightweight body, 53 grams of total weight more dispels your burdensome, bloated carrying concerns; If you are a hardcore outdoor, I would recommend this NITECORE Knight NU25 Bull Headlight. In a dark environment full of unknowns, with it, you have a "victory aura", crushing the darkness, and reaching the peak is no longer out of reach; with it, there is progress in the dark The direction, wake up courage and strength to continue on the journey ahead. Baby Bed ,Baby Bed Frame,Baby Platform Bed,Baby Bunk Beds shandong Changheng Wood Co.,Ltd , https://www.changhengwood.com
In this way, in the open area of ​​the outdoor, the orange cup lighting equipment is more suitable for the environment, the scope of illumination is wider, the angle is larger, the white light main lamp of NU25 reaches the flood angle of 100 degrees, which is the first choice for outdoor. . 
