Online: www.REI.com
URL for this product:

From the U.S. and Canada — Call 1-800-426-4840
Mon. through Sun., 4 a.m. through 11 p.m. PT.
International — Call 1-253-891-2500
Mon. through Sun., 4 a.m. through 11 p.m. PT. English language only.

Knog Boomer USB Rechargeable Front Bike Light

WHITE

Knog Boomer USB Rechargeable Front Bike Light

$39.00

(3)

Item # 814765

100% Satisfaction Guaranteed
Gear and Advice You Can Trust

Orders of $50 or more ship for free. Learn more

To view videos or use the zoom feature on REI's websites, please download the latest version of Adobe Flash Player.

NOW PLAYING

The Knog Boomer USB rechargeable front bike light offers flashy flashing galore and easy, integrated mounting. Add a stylish design and you've got one sweet, boomin' front light.

Super-bright, high-powered central white LED offers excellent visibility; light output can reach as high as 55 lumens
Rechargeable lithium-ion polymer battery offers up to 12 hrs. of flashing use (3.5 hrs. steady); low battery indicator in lens lets you know when it's time to recharge
Recharging the Boomer is easy—simply slide the light unit out of the flexible silicone body and plug into a USB port
Offers 5 useful modes: strobe flash, fast flash, random flash, constant on and a storage mode for periods when light will not be used for a month or longer
Water-resistant, slim, flexible and finish-friendly silicone body of the Knog Boomer stretches around handlebar for easy mounting; no extra mounting hardware necessary

Imported.

Item 814765

$7.80

on this item with coupon code
REIANNV through May 28.

Coupon details & exclusions.

Not a Member? Join now

How to Use Your 20% Off Coupon:

Online, at REI.com and REI-OUTLET.com

If you're an REI member: At steps 3 and 4 of checkout under REI Membership, enter your membership number and coupon code REIANNV. Note: Check "Use my dividend on this order" and we'll apply your dividend balance toward your purchase.
If you're not yet an REI member: Include an REI membership for a one-time $20 fee with your purchase and use coupon code REIANNV at checkout. (You won't have to enter a membership number.) Note: You will have the opportunity to buy a membership at checkout.
Coupon applies to highest-priced eligible item. Coupon good through 5/28.

AT REI STORES

If you're an REI member: At checkout, provide coupon code REIANNV (or a printout of this coupon) and your REI membership number to the cashier. Note: Ask to have your dividend balance applied toward your purchase.
If you're not yet an REI member: At checkout, include an REI membership for a one-time $20 fee with your purchase and provide coupon code REIANNV (or a printout of this coupon) to the cashier.
Coupon applies to highest-priced eligible item. Coupon good through 5/28.

BY PHONE: 1-800-426-4840

If you're an REI member: Provide coupon code REIANNV and your membership number when you call in your order. Note: Ask to have your dividend balance applied toward your purchase.
If you're not yet an REI member: Include an REI membership for a one-time $20 fee with your order and mention coupon code REIANNV .
Coupon applies to highest-priced eligible item. Coupon good through 5/28.

Exclusions:

Offer valid 5/17/12 9pm PT – 5/28/12 11:59pm PT.
Coupon (or coupon code) must be presented at time of purchase. Online and phone customers must use code "REIANNV" to receive this discount.
Offer valid at REI.com, 1-800-426-4840 and REI stores.
Offer not valid on REI-OUTLET.com items, REI Adventures or REI Outdoor School.
Offer not valid on sale items (prices ending in $ ._3 or $ ._9).
REI membership number is required at checkout. Not a member? You can join for a one-time $20 fee during checkout.
Offer not valid on special orders, package discounts, prior purchases, REI gift cards or e-gift cards, passes and tickets, gift boxes, memberships, shop services, rentals.
Offer not valid on bicycles, strollers, hard shell boats or stand up paddleboards.
Offer not valid on any item with GPS technology, personal locator beacons.
Offer is limited to stock on hand and backorderable items, is nontransferable and is not redeemable for cash.
Merchandise purchased with this offer is not eligible for the REI member refund.
Offer may not be combined with any other discount or offer.
Limit one coupon per customer.
To order by phone, call 1-800-426-4840 Mon. through Sun., 4am to 11pm PT.
Cashier Instructions: Apply 20% line discount to highest full-price item; please refer to exclusions.

View all Knog products

REI Membership

REI Membership $20.00

Knog Boomer USB Rechargeable Front Bike Light Customer Reviews

REVIEW SNAPSHOT®

by PowerReviews

Knog Boomer USB Rechargeable Front Bike Light

5.0

(based on 3 reviews)

100%

of respondents would recommend this to a friend.

Pros

Great visibility (3)
Rechargable (3)

Cons

Best Uses

Front headlight (3)
Good for commuting (3)

- Was this a gift?:
- No (3)

Reviewed by 3 customers

Sort by

Displaying reviews 1-3

Apr

2011

(21 of 21 customers found this review helpful)

5.0

Bright, Wide Beam in a Tiny Package

By Hilary the Scientist

from Kent, OH

About Me Casual/ Recreational

See all my reviews

Pros

Adjustable mounting
Bright beam
Charge indicator
Great visibility
Large periphery
Long battery life
Polychromatic
Rechargable
Wide beam pattern

Cons

Long recharge time

Best Uses

Front headlight
Night commute
Trail riding

Comments about Knog Boomer USB Rechargeable Front Bike Light:

I was a little hesitant to purchase the Knog Boomer USB after reading the reviews for the battery powered version, but the USB rechargeable feature was irresistible for the price (especially with the REI member refund). I'm around computers all day and all night so finding a free USB port is never a problem. It was either the Knog Boomer USB or the Flea, but the Knog has a brighter and wider beam so I went for it. It looks like they worked out all the kinks with this version.

I commute to work 8 miles each way on an old Schwinn Traveler. My route takes me down a brick cobbled hill, over a long boardwalk, through a wide paved forested path, and down some country roads. Past reviewers indicated that the Knog Battery Boomer had trouble maintaining its aim, or would switch modes when riding over bumps or shifting gears. Tonight I rode over every manhole cover, every crooked board on the boardwalk, every hellishly dislodged concrete slab on the way home with no problems. I rode down the cobbled hill twice – first fast, then down again slower to get the full cobbled road effect with no problems. The Knog maintained both its beam direction and mode with no problems. I was able to easily readjust the beam's aim mid-ride, and it held its place the entire rest of the ride home.

I was really impressed with the width of the beam when I reached the forested portion of my commute. I had grown accustomed to seeing things in two colors with my old light: bluish-white and dark. My old Cateye always made me feel claustrophobic and more than once I've found myself riding off the trail into the grassy sides because the colors made it difficult to distinguish paved path from forest edge.
The Knog Boomer USB has two yellow centers inside the large bluish white beam which I think increase the contrast, because the trail edges were easy to distinguish. The beam is so wide the bright center portion covered the entire path (~6 feet), and the extra wide periphery lit up the plants on all sides. I felt confident riding with the Knog Boomer lighting the way.

Another complaint I read was that the button was too sensitive or insensitive. When properly fitted into the silicone casing, the button is just the right sensitivity- sensitive enough that it is easy to switch modes while wearing soft gloves (or when your hands are frozen!), and insensitive enough that there is no worry of it sporadically changing modes. The button is sensitive enough that it would probably switch on if tossed in a bag, though.

I've had it for 2 days and ridden about 20 miles with it on so far (16 in twilight conditions, 5 in full dark), and the more I use it the more I enjoy it. It has 4 light patterns: 1) constant on/off flash, 2) short-long 3) long repeating pattern 4) solid on. When charging/plugged into the USB port, it emits a bright red light so I would not recommend charging it in the same room you sleep in. I'm not sure how long it takes to charge, I haven't had it long enough to run it down yet, but I think a while since it was plugged in for 30 minutes this afternoon and remained red. The USB port on the back has a nice hard case that fits seamlessly with the rest of the light.
The only downside seems to be that the silicone is almost too sticky- I bought the white version and keep finding my cat's grey hairs all over it. Also, once it is in the silicone case it takes a little wiggling to dislodge in order to access the charging port.

Comment on this review

Aug

2011

(5 of 5 customers found this review helpful)

5.0

Work perfectly

By adamgrace

from Baltimore MD

About Me Avid Cyclist

See all my reviews

Pros

Easy to mount
Feels nice
Great visibility
Long battery life
Rechargable

Cons

Best Uses

Front headlight
Night commute

Comments about Knog Boomer USB Rechargeable Front Bike Light:

This light works great for my slight pre dawn rides. I ride on rail trails and the light is nice to alert walkers and other riders. You can see this from what seems like forever- I have had other riders comment that they could see me coming on a straight away from quite far. The mount is just what I was looking for- simple, easy, without velcro or screws. Easy on and off, with a secure hold. The main light piece takes a bit of finesse to get out of the latex, but once you develop a technique it is no problem. I find it easiest to grip the sides while pushing from the bottom. The random strobe makes a great alert.
I have not used the light for strict night riding, but it is a great light to flick on while taking the car to inside at night, plenty of light to walk in the pitch dark.

Comment on this review

Jan

2012

(1 of 1 customers found this review helpful)

5.0

Great Bike Commuting Light

By Scott Bike Commuter

from Seattle, WA

About Me Avid Cyclist

See all my reviews

Pros

Great visibility
Helmet/Removable mount
Rechargable

Cons

Best Uses

Daily Commuting
Front headlight
Night commute

Comments about Knog Boomer USB Rechargeable Front Bike Light:

I'm a year round everyday bike commuter in Seattle riding into work in the dark at 5:30am. My biggest problem with bike lights is that they slowly get weaker and I need to remember to replace the batteries. This light solves that problem. When I get to work I pull them off (very easy to remove and put on) and about once a week plug them into my computer to charge. While plugged in the light turns green when it is fully charged. These are great bright lights that enable me to be seen.