Keep your favorite lights running bright with Serfas' Bat-4 Replacement Battery. It is included with TSL-2500 and TSL-Police lights but fits several other models as well.

The Pathfinder USB Headlight from Portland Design Works is unlike any other bike light on the market, incorporating technologies to help you see and be seen while riding, day or night. The Vertical Cutoff Beam is designed to focus the 200 lumen main beam onto the road in front of you and prevents lost lumens that can blind oncoming traffic. For daytime riding, the Daytime Running Flash is bright enough to make you seen even on the brightest days. The Battery Meter lets you know exactly how much battery life you have left before needing to recharge with the included USB cord. The Pathfinder includes a powerful lithium-ion battery and a darkness destroying CREE LED bulb. It provides superior luminous guidance for up to 25 hours of ride time. The rugged construction is weatherproof and strong enough to handle the abuse of an urban commute. - 4 Modes: Steady low (4 hours), Steady high (2 hours), Pulse (8 hours), Daytime Flash (25 hours) - Lumens and burn times certified by Labsphere Illumia Light Measurement System to FL1 standard - Vertical Cutoff Beam to focus 200 lumens on the road ahead - CREE LED - Battery Meter for Li-ion battery - Micro USB charging cord included; 3 hour charging cycle - Weatherproof exterior for all season riding - One second delayed power switch to prevent accidental on/off - Light wakes up in last mode used - Includes UV-proof quick on/off handlebar mount - Weight: 57 g (2 oz)

The City Rover Io set consists of the City Rover 700 lumen USB-rechargeable headlight and the Io USB-rechargeable taillight. The City Rover 700 has a powerful lithium-ion battery and a darkness-destroying CREE LED bulb with side illumination. The Io has 3 different modes—steady, flash, and pulse—and is perfect for urban riding. - Both lights are USB-rechargeable - Io runtime up to 20h, City Rover up to 36h on daytime flash modes - Headlight has 5 modes for 2-36h run time - Headlight has additional 15 minutes in low-power safety mode after low-battery indicator light comes on - Headlight wakes up in last mode used - Taillight mounts vertically or horizontally - Headlight 125g, taillight, 53g

We've teamed up our popular Blaze 210 SL headlight & Superflash USB tail light to create the rechargeable bike light set that is eye catching from 360°. It’s a perfect commuter combo set that can transition from busy roads to multi-use paths with the click of a button. The Superflash mode is great for daytime visibility and the Courtesy mode shines best on paths. What a combo! Blaze 180 USB specs: - Cree XPG3 LED provides high and low power beam along with Courtesy & Superflash modes - FL1 Tested: Run times: 2 hrs (high - 210 lm), 3 hrs (low - 120 lm), 5 hrs (Courtesy - 65-185 lm) and up to 21 hrs (Superflash - 210 lm) - Amber side lights provide 275° of visibility - Highly visible, even in daylight - Water resistance rated to IPX6 standard - 1000 mAh lithium polymer battery charges in 3 hours with micro USB cable (included) - Smart Charging Technology with built in low battery indicator - Quick Twist bracket mounts, adjusts or removes without tools - 87 grams Superflash USB specs: - High output surface mounted LED plus 2 5mm LEDs provide steady, Courtesy & Superflash modes - Run times: 8 hrs (steady – 4 lm), 10 hrs (Courtesy - 1-3 lm) and up to 36 hrs (Superflash - 4 lm) - Provide 180° of visibility - Highly visible, even in daylight - Water resistance rated to IPX6 standard - 230 mAh lithium polymer battery charges in 2-4 hours with micro USB cable (included) - Smart Charging Technology with built in low battery indicator - Includes seat post and seat stay mounts and clip mount for multiple mounting options - Mount it to your rear rack with the Rack Bracket (#3108) which is sold separately - 59 grams

Cover your 12 and your 6 for daytime and nighttime riding with the powerful, USB-rechargeable TigerMoth Headlight and Taillight Set. Lights feature a compact design and simple, tool-free installation. - USB-rechargeable (charging cable included) - Universal tool-free attachment - 100-Lumen Headlight runtime varies from 1.5–18 hours depending on one of four lighting modes - 20-Lumen Taillight runtime varies from 1.5–15 hours depending on one of seven lighting modes - Extra mounting brackets sold separately - Mode memory: light automatically lights up in the last mode used

A cost-effective light for city riders needing high visibility, Vya Smart Headlight features an always-on SafePulse beam that alerts motorists over 1KM away. Auto-on/off sensors – like all Vya lights – automatically activate the light when a ride is started and turns itself off after, with a delay built in for stoplights. The simple convenience is a feature riders love, eliminating the need to turn on/off lights. A scientifically designed SafePulse beam pattern for daytime riding not only gets noticed, but allows the driver to accurately judge distance from the rider and their direction of travel – a safety feature not possible with strobing lights. Attaching Vya is effortless with a simple clockwise 1/4 turn into the mount locking the light in place and activating the auto-on feature. When it comes time to recharge, remove Vya from the mount in seconds and insert the integrated USB paddle directly into a computer or USB power outlet – no cables keeps recharging simple and efficient. The next evolution in bike lighting, Vya Smart Lights are unmatched for their ultra-compact engineering and effortless safety. Features - 150 Lumen Output with variable SafePulse beam pattern optimized for day and night visibility - Smart technology senses motion and automatically turns Vya on when inserted into mount and will remain on, even when a rider pauses at stoplight; Auto-off when bike is parked or light is removed from mount - SafePulse beam pattern scientifically designed to enhance a driver’s ability to judge the cyclist’s distance and direction of travel without the risks associated with flashing lights - Premium Cree LED can be seen over 1KM in daylight - 10 hour runtime perfect for those that want safety light that doesn’t need to be recharged everyday - Versatile mounting design can be secured to a range of handlebars, optional GoPro mount interface for unlimited mounting options - USB Mount Receptor allows light to be securely mounted or removed from bike in seconds with a simple, secure 1/4 turn lock; light will not turn on when removed from mount - Direct USB charging without cables fully charges in 2 hours - Made with bio-renewable material waterproof to 1 meter (when inserted in mount) for all-conditions reliability (IP67 Rated) Specifications - Lumens: 150 (SafePulse) - Runtime: 600 min (SafePulse) - Beam Angle: 30° (flood) - Charge Time: 120 min

Bike safety reinvented, Vya Pro Smart Lights provide an uncompromising powerful SafePulse beam with convenience commuters love. Smart auto-on/off sensors are a true game changer – start riding and the light turns on automatically and will shut itself off after the ride, with a delay built in to remain on at stoplights. Whereas Vya taillights will always pulse for effective rear visibility, the smart headlight senses ambient light and knows to pulse in the daytime but remain steady at night – automatically adjusting to the safest riding mode possible. Attaching Vya is effortless with a simple clockwise 1/4 turn into the mount locking the light in place and activating the auto-on feature. When it comes time to recharge, remove Vya from the mount in seconds and insert the integrated USB paddle directly into a computer or USB power outlet – no cables keeps recharging simple and efficient. For the busy commuter that wants premium visibility but a lighting setup that removes in seconds, the smart Vya Pro Commuter Combo is the perfect solution. Features - 200 Lumen Headlight (250 SafePulse) & 100 Lumen Taillight optimized for maximum visibility day and night - Smart sensor technology senses motion and automatically turns lights on when inserted into mount; Auto-off when bike is parked removed from mount - SafePulse beam pattern scientifically designed to enhance a passing driver’s ability to judge the cyclist’s distance and direction of travel without the risks associated with flashing lights - Powerful custom optics to provide a punchy beam visible over 2KM in daylight - USB Mount Receptor allows lights to be securely mounted or removed from bike in seconds with a simple, secure 1/4 turn lock; lights will not turn on when removed from mount and slipped into a pocket or bag - Easy direct USB charging without cables fully charges in 2 hours - Made with bio-renewable material waterproof to 1 meter (when inserted in mount) for all-conditions reliability (IP67 Rated) Headlight Specifications - Lumens: 200 (high), 250 (SafePulse) - Runtime: 120 min (high), 360 min (SafePulse) - Beam Angle: 30° (flood) - Charge Time: 120 min

Light & Motion Vis 1000, Light up the road or trail with 1000 lumens of raw power, or switch to SafePulse mode for maximum daytime safety. Industry-leading reliability, easy mounting, 4 modes. - Powerful 1000 lumen output in a tough, lightweight package. - Mounts on handlebar but light enough to mount on helmet; GoPro and helmet mounts available separately. Easy to mount and quick switch between bikes. - Superior daytime safety with 500 lumen SafePulse mode. - 4 modes with up to 12 hour run time. - Powerful side lights for safety on the road. - Industry-leading waterproofing and impact resistance, 2 year warranty. - Quick recharge via USB cable. - Accurate battery status indicator monitors both charging and power remaining. - Lockout Mode ensures light stays off during transport in a bag or pack. - Race Mode offers one-touch high/med toggle.

The Vis 360 Pro Plus delivers a powerful 600 lumen output with a revolutionary design to be easily transferred between a helmet and head strap. The bike helmet mount balances the light on the head for singletrack epics and the innovative rear lighting assures safe visibility when pedaling on the road. The included comfortable non-slip head strap is perfect for multiple non-bike activities that include and are not limited to: running, kayaking, climbing, and camping. The lightweight system remains waterproof in all types of weather conditions and the integrated rear light/battery pack allows for a low profile setup. This light is the pinnacle of mixed-use safety and utility lighting. - 600 Lumen Headlight and 25 Lumen Taillight certified to the FL-1 Standard with premium CREE LEDs for optimum visibility day and night - Rear light can be switched on or off depending on intended use—leave on around roadways or turn off for trail adventure - Bike helmet mounts transforms Vis Pro into a high performance bike light - Micro-peened reflector on headlight optimizes the beam pattern providing a smooth spot void of distracting hard edges with plenty of punch for fast moving activity - Multiple power settings conserve runtime for adventure including a 70 lumen/12 hour option great for camping or backcountry touring - Comfortable non-slip head strap allows lights to be balanced on head - Waterproof construction (IP67) allows the light to be used in challenging environments not suitable for average headlamps - Charge with included Micro USB cable that allows recharging through external battery packs and solar chargers - Lumens: 600 (high), 300 (medium), 150 (low), 150 (pulse), 70 (extended) - Runtime: 120 min (high), 240 min (medium), 480 min (low), 960 min (pulse), 720 min (extended) - Beam Angle: 20° (spot) - Charge Time: 360 min - Fast Charge: No - IP Rating (FL-1): 67 - Depth Rating (FL-1): 1 meter(s) - Impact Resistance (FL-1): 1 meter - Product Weight: 140 grams - Product Dimensions: 1" x 1" 1.25" - Compatible Mounts: Head, Helmet

Compact, aero-post compatible safety light with Smart Connect compatibility. Smart Connect allows for customization and/or control of the output modes through the Lezyne LED Ally phone app, and it can link with compatible Lezyne LED front lights. Its co-molded construction is super-light, yet durable and has an IPX7 waterproof rating. Its Wide Angle Lens offers up to 270° of visibility. The KTV Drive Pro Rear provides up to 75 lumens (Daytime Flash) and five output/flash modes. And it features an integrated USB stick for convenient cable-free recharging for up to 19.5 hours of runtime. Specs - Max Lumens: 75 - Weight: 45g - Max Runtime: 19:30 hours - Recharge Time: 2:15 hours

High visibility is a must for anyone who spends a lot of time riding on roads. Lezyne's Zecto Drive Max 250 rear light ensures you are well seen in from the rear, day or night. With eight total modes from long-lasting economy mode to the 250-lumen output Daytime Flash mode, you can tailor this light's output to suit your needs at any time. It's ultra-compatc design features durable composite matrix construction with a machined aluminum faceplate and a versatile 2-in-1 clip and strap mounting system. - Micro-USB rechargeable

New to our Year 13 collection, the Classic Drive 700XL brings classic Lezyne styling to our modern lineup of cycling lights. Offering a super-bright 700 lumens of output and up to 95 hours of run-time, this light is incredibly versatile day or night. It features eight output modes, including a powerful Daytime Flash mode, and has side cutouts for 180° of visibility. A versatile strap securely mounts to most handlebars, and an included micro-USB cable handles the charging. Specs - Max Lumens: 700 - Weight: 124g - Max Run-time: 95 hours - Recharge Time: 3 hours

The KTV Pro Smart Pair is the most advanced pair of cycling lights for commuters and cyclists looking for greatly improved visibility. The pair comes equipped with our Smart Connect wireless technology, which allows them to be quickly programmed and customized by the companion LED Ally phone app. Once programmed and paired, the front light wirelessly controls the rear light when toggling through its modes. Set up only the modes you need, with up to four mode-sets for a variety of cycling settings. Front The front light is super-compact and lightweight, and features a super bright 200-lumen Daytime Flash mode. Its co-molded construction is super durable and has an IPX7 waterproof rating. With a cable-free USB recharging stick, it can run for up to 20 hours on a full charge. And the 2-in-1 patented clip/strap system attaches to a variety of bars and loops. Rear Powerful and versatile cycling taillight with a highly visible 75 lumen Daytime Flash mode. Its construction features a light and durable co-molded design that’s IPX7 (waterproof) rated. It has six output modes, and features our Wide Angle Optics for up to 270° of visibility. The KTV Smart 75 is compatible with round or aero posts, and it has an integrated cable-free recharging USB stick. Specs - Max Lumens: 200 (front) / 75 (rear) - Weight: 47.5g (front) / 45g (rear) - Max Runtime: 20 hours (front) / 19:30 hours (rear) - Recharge Time: 2:15 hours (front) / 2:15 hours (rear)

The most advanced front/rear cycling light combo available. The Connect Smart Pair comes equipped with our Smart Connect wireless technology. This pair of lights can be quickly programmed and customized by the companion LED Ally phone app. Once programmed and paired, the front light wirelessly controls the rear light when toggling through its modes. Setup only the modes you need, and up to four mode-sets for whatever type of riding is planned, day or night. Front A powerful, multi-purpose front light with up to 1000 lumens of output. Its machined aluminum body is lightweight, super-rugged and heat-dissipating. It features eight output modes, with a class-leading 1000 lumen Daytime Flash mode. With its MOR (Maximum Optical Reflection) lens, light output is optimized and evenly dispersed. And its versatile strap securely mounts to a variety of bar shapes and sizes. Rear Powerful and versatile cycling taillight with a highly visible 75 lumen Daytime Flash mode. Its construction features a light and durable co-molded design that’s IPX7 (waterproof) rated. It has six output modes, and features our Wide Angle Optics for up to 270° of visibility. The KTV Smart 75 is compatible with round or aero posts, and it has an integrated cable-free recharging USB stick. Specs - Max Lumens: 1000 (front) / 75 (rear) - Weight: 153g (front) / 45g (rear) - Max Runtime: 87 Hours (front) / 19:30 Hours (rear) - Recharge Time: 5:30 Hours (front) / 2:15 Hours (rear)

- Modes include High Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 15 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged

- Modes include High Flash, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 7.5 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Side illumination ports

- Modes include High Flash, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 12 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Side illumination ports - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Front Modes include High Steady, Low Steady, DayTime Pulse, NightTime Pulse and Economic Flash. - Rear Modes include High Flash, Low Steady, DayTime PULSE, NightTime Pulse and Economic Flash. - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 20 hours for front and 10 hours for rear - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Modes include High Flash, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 11 hours 15 mins - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Side illumination ports

- Modes include High Steady, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 22.5 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged

- Modes include High Steady, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up 24 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Side illumination ports

- Modes include High Flash, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 10 hours 15 mins - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Side illumination ports

- Front Modes include High Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Rear Modes include High Flash, Low Steady, DayTime PULSE, NightTime Pulse and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 15 hours for front and 7.5 hours for rear - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Front Modes include High Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Rear Modes include High Flash, Low Steady, DayTime PULSE, NightTime Pulse and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 20 hours for front and 10 hours for rear - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Modes include High Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 26 hours - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Side Illumination ports allow cyclists to be seen when riding across traffic lanes

- Front Modes include High Steady, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Rear Modes include High Flash, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 22.5 hours (Avenue F-100 COB) and 11.25 hours (Avenue R-50 COB) - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Front Modes include High Steady, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Rear Modes include High Flash, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 24 hours for front and 10 hours for rear - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged - Multiple Mounting Options: vertical or horizontal mounting options as well as a clip for mounting to packs, bags or belts

- Front Modes include High Steady, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash. - Rear Modes include High Flash, Medium Steady, Low Steady, DayTime Pulse, NightTime Pulse, and Economic Flash - Fully USB rechargeable: no batteries to buy or replace - Runtime up to 26 hours for front and 11.25 hours for rear - Memory function: light turns on at the last mode it was turned off - Power saving function: 10% power or less, lights will automatically switch to lowest lumen output - Built-in battery indicators: RED = less than 25%, GREEN = fully charged

Describing this light as bright is a serious under-statement. Using new COB technology, Blinder Grid produces a punchy 100 lumens that will ensure you're seen and safe in all light conditions. It features a grid pattern that makes this Blinder one of Knog's most individual lights ever. The graphic flash pattern has 8 different modes and is also available as a front light to make a unique pair. The Blinder Grid has integrated USB recharging, is 100% waterproof and has a whopping 60 hour run-time when using eco flash mode. INTEGRATED USB PLUG No charging cable is required for your Blinder, its integrated USB plugs directly into USB ports. It has a charge time of 4 hours. When your Blinder is running low on battery, a red led will light up next to the button. This ring will turn green and then turn off once the Blinder is fully charged and ready to go. TOOL-LESS MOUNT Blinder lights comes with a tool-less removable silicone straps for bars and seat posts 22 – 32mm in diameter. A large strap is also provided that will fit tubes and head tube profiles with a circumference of up to 200mm. Knog's tool-less mounting system makes attaching your light incredibly simple and using silicone straps means there'll be no chance of damaging your bikes frame or beloved paint job. EASY ON, EASY OFF Removing your Blinder for charging or security purposes is a doddle with our handy clasp removal system. Strong enough to hold your light firmly in place when in use and big enough to use even when wearing gloves in colder conditions, this is a king amongst clasps. BLINDINGLY BRIGHT Producing 100 lumens of light output makes this Blinder a seriously bright option for any cyclist. Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time. - Dimensions: H: 43mm x W: 43mm x L:46mm - Weight: 34 grams - Charge Time: 4 hours - Lumens: 100

Describing this light as bright is a serious under-statement. Using new COB technology, Blinder Skull produces a punchy 100 lumens that will ensure you're seen and safe in all light conditions. It features a grid pattern that makes this Blinder one of Knog's most individual lights ever. The graphic flash pattern has 8 different modes and is also available as a front light to make a unique pair. The Blinder Skull has integrated USB recharging, is 100% waterproof and has a whopping 60 hour run-time when using eco flash mode. - Dimensions: H: 43mm x W: 43mm x L:46mm - Weight: 34 grams - Charge Time: 4 hours - Lumens: 100 INTEGRATED USB PLUG No charging cable is required for your Blinder, its integrated USB plugs directly into USB ports. It has a charge time of 4 hours. When your Blinder is running low on battery, a red led will light up next to the button. This ring will turn green and then turn off once the Blinder is fully charged and ready to go. TOOL-LESS MOUNT Blinder lights comes with a tool-less removable silicone straps for bars and seat posts 22 – 32mm in diameter. A large strap is also provided that will fit tubes and head tube profiles with a circumference of up to 200mm. Knog's tool-less mounting system makes attaching your light incredibly simple and using silicone straps means there'll be no chance of damaging your bikes frame or beloved paint job. EASY ON, EASY OFF Removing your Blinder for charging or security purposes is a doddle with our handy clasp removal system. Strong enough to hold your light firmly in place when in use and big enough to use even when wearing gloves in colder conditions, this is a king amongst clasps. BLINDINGLY BRIGHT Producing 100 lumens of light output makes this Blinder a seriously bright option for any cyclist. Efficient Chip on Board (COB) LEDs provide maximum brightness level for up to 90% of the battery burn time.