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[[File:PetzlHeadlampRunningNight.jpg|right|thumb|400px|Image from Petzl Wallpapers.]]I've run with many different running lights over the years, and I've seen the quality and brightness increase as the cost has fallen. There are many good running lights on the market, but having tested many, there are just three I'd recommend, each for a different purpose. The best light for urban running, when it's more about being seen than seeing, is the Black Diamond Sprinter. It's small, rechargeable, bright, balanced, with an even light, and has a rear flashing red LED built in. However, the light I use most is the Light Belt, a waist mounted light that allows you to see the shape of the ground ahead, and I prefer it even on asphalt. And while I almost never use the Petzl e+lite, it's my faithful "oops" light I carry as a backup. =Light Belt=I love waist mounted lights available as you can see the shape of the ground so much better. This style of light is relatively rare, and I've been pleased to work with Light Belt as they've developed and refined their product. I found this is the light I've used consistently, even for running on the relatively smooth asphalt of my local Greenway. If you've not run with a waist mounted light, I'd suggest playing around with your head mounted light, taking it off and moving it to your waist and seeing how your perception of the ground ahead of you changes. Once you've made to the switch, it's hard to go back. You can buy them at http://www.light-belt.com. * On full brightness the beam is brighter than I need (700 lm), so I typically run with it a notch or 2 down. I often run with the light belt at a relatively low intensity, especially just before dawn as it balances the rising light levels and is strangely less claustrophobic.* The light is perfectly smooth and even, and being a waist mounted, shows the shape of the trail and any obstacles so much better than a head mounted light. (I have the "silver lens" version that has the smooth beam pattern. There is a "reflective mirrored" option that has a more focused beam pattern, but I'd recommend the even illumination as a priority.)* The belt works remarkably well, with almost no bounce. The light sits on a small foam pad for stabilization but uses a thin (1 inch/2.5cm) belt to go around your waist or hips. The clasp a surprisingly clever magnetic system; just bring the 2 ends close together and the magnets click it closed. To unclasp you have to slide the 2 ends vertically, as you can't pull them apart. This seems like a massively overengineered and sophisticated solution, but I love it to bits. It works perfectly no matter how cold and tired I am.* You don't blind other runners depending as you turn to look at them, and it's easy to tilt the light so that you can see the ground ahead without shining into people coming towards you.* The Light Belt comes with the 18650 Lithium Ion 3400 mAh rechargeable battery. These batteries are expensive, so expect to pay over $20 for a genuine one, and watch out for fakes. That said, these batteries are expensive for a reason, having excellent power density and life. Being rechargeable, you can carry spare batteries if you're running all night and need full brightness. (The light works as a recharger for the battery, as the battery itself has overcharge protection. Just plug the micro USB cable into the light.)As always, there are some downsides to the Light Belt, but relatively few:* The Light Belt is waterproof to IPX6, so it's fine in heavy rain, but not submersible. This shouldn't be an issue unless you are doing waist deep stream crossings. * There is no flashing light at the back. I simply purchased some cheap clip-on flashing safety lights which are cheap and effective.* You can't use a waist mounted light to look at your needwatch, though most running watches have a backlight. It's also harder to use a waist mounted light to rummage through a drop bag, though I found I can hoist the Light Built up around my chest and pointed down and it works pretty well.<gallery widths=300px heights=300px class="center">File:Light Belt (1).jpgFile:Light Belt (2).jpg</gallery>=Black Diamond Sprinter=The Sprinter is my top pick for head mounted lights, available at <jfs id="B01LE9ZA28" nonl="true" noreferb="true"/>. * The flashing rear safety light is a great idea, and critical for urban running. The safety light comes on with the main light, but you can override this to turn it on and off independently. * Having the battery pack at the back balances the weight of the light and makes it seem particularly lightweight. It also allows you to put the batteries under a hat to keep them warm, though that obviously prevents the safety light from being seen. * There is a strap that goes overhead helps stabilize the light without needing the headband too tight. Some * The Sprinter has a regulated output, so it will stay the same brightness until the batteries are far nearly flat. (See below.)* I wish the Sprinter was better waterproofed, but splash proof to IPX4 should be fine in most situations. I've run in it in heavy rain without any issues, so unless you drop it in water you shouldn't have an issue. There are some drawbacks to the Sprinter:* The Sprinter only has a diffuse beam pattern, with no spot, though in practice, I've rarely found this to be a problem, even when navigating in the woods. * For trail running you want the Light Belt or other waist mounted light. * I'd rather have replaceable AA or AAA batteries rather than a built in rechargeable battery. Replaceable batteries allow me to have more than othersone set charged up at a time and just swap them over. The built in batteries should last a long time, but when they eventually wear out, you need to replace the light. [[File:BD Sprinter.jpg|none|thumb|200px|Black Diamond Sprinter.]]=Types Petzl e+Lite=The Petzl e+Lite worth considering as a backup light, but don't use this as your primary light unless weight is of paramount importance. It's not quite bright enough for general use and the lithium batteries are pricy. However, it will fit in the pocket of my Race Ready Shorts, so it makes a great 'oops' light. I carry the e+Lite on all-day, self-supported runs where I think it's unlikely I'll be out after dark. I've misjudged things before, and an emergency light was the difference between getting home and spending the night in a snow storm on exposed fells. The e+Lite is <jfs id="B01KYTR0HM" noreferb="true" nonl="t"/>.[[File:Petzl e+lite.jpg|none|thumb|250px|The e+Lite showing the small case it fits into.]]=What to look for=There are three four factors to consider with a running light; location, the beam pattern , regulation and regulationbrightness.
==Location==
The three locations for first step in choosing a light while running are handheldis to work out where you want the light; in your hand, waist mounted and head mounted. I do not recommend handheld lights at all. The biggest problem is that they mess up your running formwaist, but they occupy one of or on your hands making it tricky to do anything in the dark. There are advantages and disadvantages to waist mounted and head mounted. Because a head mounted light is aligned with your eyes, it's hard to see the shape of the ground. This is best seen in the images below. <gallery widths=500px heights=400px>=Head Mounted===File:RXP Eye Level.jpg|The light at eye level: Notice how 'flat' the path looks.File:RXP Waist Level.jpg|The light at waist level shows the texture Most people use head mounted lights, and shape they have a number of the path. </gallery>Other considerationsadvantages:* Head mounted directs the light where you point your head, making it easier to see where you're going. * Head mounted also works better for directing the light to things in your hands, like putting on gloves or looking at your [[Best Running Watch|Running Watch]]. * Waist mounted lights are much better in the rain or dusty conditions. With a head mounted light, the beam picks up the rain or dust in front of your face, making it hard to see.
* Head mounted lights are better at showing up branches or spider webs that are about to hit your face.
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If there are insects about, a head mounted light causes them to fly into your face, which is even more unpleasant. ==Petzl e+LITE=Handheld===This is worth considering as a backup light, but I don't use recommend handheld lights for several reasons. The biggest problem is that keeping the light pointed in the right direction changes your arm movement and this as messes up your primary light[[Running Form]]. It's not bright enough and In addition, handheld lights occupy one of your hands making it tricky to do anything in the lithium batteries are pricydark, though knuckle lights overcome this. ==Beam Pattern – Spot vs Diffuse=={| class="wikitable"|- valign="top"|[[File:RXP Spot.jpg |none|thumb|350px| The spot beam illuminates further. ]]|[[File:Petzl e+liteRXP Eye Level.jpg|none|thumb|400px350px|The e+lite showing diffuse beam illuminates wider and more evenly.]]|}Many lights project a narrow spot beam that illuminates longer distance, which can be handy for navigation, especially on ill-defined trails. Most of the small case time I prefer a light with an evenly diffused beam, even though it fits intodoes not reach as far as a spot beam.]]==Petzl MYO XP BeltRegulation – Light output over time==I found With a regulated light the light intensity will stay constant over most of the life of the wire to battery. When the battery belt too annoying to recommend this as a general is nearly depleted, the lightwill rapidly dim (see the graph below.) The regulation is nice, but it's worth considering for extremely cold conditionswhen the end of the regulation period is reached, the light intensity can drop so quickly that you get caught out. [[File:Petzl XP BeltLight Regulation.jpg|none|thumb|400px350px|The XP Beltdifference between regulated and unregulated light output.]]==Petzl ULTRABrightness== IThe brightness you need depends on your situation. In many cases you just need to see what's immediately ahead of you, so brightness is not critical. If you'd like to be able to afford this re on trails, then a really bright light can help see what direction a trail is taking, or help with navigation. A bright light can also help psychologically, as a small pool of lightcan become confining and claustrophobic. However, but I donif there't believe it offers good value for moneys a little more ambient light, then a dim light can work best. [[File:Petzl UltraA dimmer light can provide enough to shoe you what's ahead without compromising your night vision.jpg|none|thumb|400px|The ULTRA – Ultra niceHaving a light that will go both very bright and very dim is ideal, Ultra expensiveand several of the lights I recommend can provide both extremes.]]