The red light at the back of the headlamp illuminates when the front white light is turned on. The red light will flash as a warning when you press the middle button. When you press the button again, the red light will turn off.
Each red light headlamp has three settings: high, low and red. The red light setting helps preserve your night vision, which is why this is the preferred setting for stargazing. There are several more benefits to night vision preservation:
The best headlamps aren’t the brightest or the most powerful. They’re simply the ones you can use most of the time without fumbling for your phone.
The three main things you need in a headlamp are bright light, red light, and options for dimming or turning off the light completely. If you’re going out into the wilderness on a multi-day trip, you should have a variety of light options to choose from.
There are a number of great headlamps on the market, but they generally fall into three categories:
Bright light: These lights have higher maximum brightness than less powerful headlamps. They’re also more expensive than their less powerful counterparts. Most run on AAA batteries and have rechargeable NiMH batteries, so they’ll work well with recharging kits such as Solar Ready or GoalZero’s Nomad 14 (which is cordless). You can also find AA battery powered headlamps that come with rechargeable AA batteries inside the unit.
Red light: These lights are designed to be used in areas where red light is deemed necessary for safety reasons — like at intersections or when crossing streets at night. They don’t have as much power as their brighter cousin, but they cost a fraction of what a bright light.
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What headlamp does the US military use?
The US Military uses the Petzl Tactikka and Tactikka+ headlamps.
The Petzl Tactikka is a headlamp that is used by the US military when they are in the field, on night missions, or wherever a hands-free light source is required. The Petzl Tactikka has 3 LED lamps: one red LED, one white LED and one green LED.
The red LED lamp is used for preserving night vision; the white LED is good for general use, and the green LED is helpful for reading maps because it does not wash out colors as much as a white lamp does. You can adjust the brightness of each lamp depending on your needs.
Introducing the H502pr, our new, compact photo red light headlight. It’s perfect for camping, backpacking, and indoor use. It’s small enough to fit inside your pocket but strong enough to light up the darkest nights. Weighing only 1 oz., it is also great for everyday carry as an extra light.
With its smart user interface that provides fast access to all brightness levels and a built-in battery life indicator light, this H502 is a game-changer in headlamp technology.
2. Nitecore NU25 360 Lumen Triple Output
Nitecore’s NU25 flashlight is the perfect companion for every outdoor night. The Quad Output version combines the worlds most advanced LEDs in one tiny flashlight. Utilizing Nichia’s highest CRI 95%+ output, plus red LEDs for enhanced night vision capabilities and a built-in infrared motion sensor to activate both flash modes when detecting movement up to 9 meters away. The included USB cable allows you to charge the light batteries externally from your laptop or USB power bank via the LumenTac adapter included in this package.
The VITCHELO V800 is a compact, comfortable and lightweight headlamp that offers you a super bright beam of light of up to 360 ft (110 m). It has 2 separate buttons for the white and red lights so you can change these independently, enabling you to set the mood or signal your intentions.
This headlamp provides an excellent balance between brightness and battery life. It is also waterproof so you don’t have to worry about it getting wet during those outdoor activities. The VITCHELO V800 is perfect for camping, hiking, running and other outdoor activities where powerful lighting is required.”
Bestseller No. 1 
This headlamp is strong and versatile. It can be used as a headlamp or as an emergency backup flashlight in an emergency situation. It has four lighting modes (High, Low, Strobe, and Red LED) so you have the perfect light for the task at hand from a distance of up to 328 feet.
There are two light sources on this headlamp – one Quad Power LED and one Double Power white LED which emits a combined 350 lumens. The red and green Single Power LEDs for night vision have dimming and strobe settings so you may adjust the intensity to suit your needs.’’
Designed with a CREE XP-G3 S3 LED and featuring three output levels (6 lumens, 45 lumens, and 125 lumens), this headlamp offers versatility in an ergonomic package. With an impressive 330 hour run time on Turbo mode, it can easily keep you going throughout your long trip.
The lightweight and comfortable design of this product makes it perfect for everyday use. It also comes with a 5 year warranty, making NU32 your perfect travel companion.”” – Product Description.
The versatile STR61706-BRK headlamp is a personal area/work light that is perfect for various nighttime uses around the house, including reading maps or doing research at conferences. It features an ultra-lightweight lithium polymer battery that can be charged via a USB cord and will last up to 100 hours on high mode or 12 hours on low mode. The included head strap and hat clip make this compact headlamp comfortable enough to wear all day long. Comes with an extra set of replaceable batteries.”
The Byte is a headlamp that can be worn with or without glasses, even in windy conditions. Small and light enough to wear on a daily basis under your hat brim, it has a powerful 200 lumen output and features 1 Maxbright LED and 1 red Ultrabright LED for maximum brightness.
The 58 hour burn time will keep you from ever having to replace a dead battery again. Easily accessible batty door enclosure allows for easy access to batteries during use.”
The Coast Beam Focusing LED Headlamp is the perfect headlamp for any activity. Featuring a Twist Focusing System that goes from an ultra-wide flood beam to a tight spot beam, it’s ideal for reading maps at night and general use. Dual-color lighting options let you choose between white and red LEDs for nighttime visibility, or white only for those nights when you’re looking for some extra help seeing what you’re doing. Made with an anti-fog treatment to ensure consistently clear visibility, this lamp also meets IPX4 water resistance standards, meaning it can be submerged in 3 feet of water without damage.
The KAWACH K-1110 LED Motion Sensor Headlamp makes it easy to navigate at night. Using a hands-free soft silicone cup, you can shine the light exactly where you want it without having to move the headband or hold it directly above your head like other headlamps.
The lightweight design lets you wear it for long periods of time without any discomfort. It’s perfect for hunting, camping, hiking, fishing, and other outdoor activities where you need a bright light on your head. Plus, endless uses make it an easy addition to your toolbox or first aid kit!
Our dance headlamp is the perfect addition to any outdoor adventure. Our LED light features four light modes for different uses and is durable enough to withstand water, dust, and damage. It’s also adjustable, so you can position it precisely how you like it.
And because it’s multi-functional, this headlamp not only works as a flashlight but also provides additional illumination for reading maps or performing other tasks in dark places.”” Heavy duty construction ensures this headlamp will withstand even the most extreme environments. Offering exceptional value, our headlamp is backed by an industry-leading warranty.”” No