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Cygolite Expilion 350-Lumen USB Rechargeable Headlight

192 customer reviews
| 9 answered questions

About the Product

  • Bike light with innovative Cree XPG LED technology for 350 lumens of illuminating power
  • Quick-release internal lithium ion battery stick lets you swap out batteries on the fly
  • Wall charger compatible with 100V to 240V for use worldwide; also supports USB charging
  • One LED bulb with 350 lumens; five-hour charge time; 130-gram weight; run time up to 24 hours
  • Includes limited one-year manufacturer's warranty

Technical Details

Product Description

Product Description

State-of-the-Art Cree XPG LED technology supercharges the ExpiliOn’s brightness while the quick release internal Li-Ion battery stick gives riders the complete package: brightness for the trails, compact size for commutes, and the ability to swap batteries on-the-fly for extended run times. This handlebar mounted system features 7 lighting modes, USB charging, battery low indicator, for optimum power and convenience on every ride.

A quick-release internal lithium ion battery stick lets you swap batteries on the move for longer rides.
See the road when the sun sets -- and ensure the cars see you -- with the Cygolite ExpiliOn bike light. Innovative Cree XPG LED technology puts out an impressive 350 lumens of illuminating power, while a quick-release internal lithium ion battery stick lets you swap out batteries on the fly (extra stick sold separately). Bright enough for the trail and compact enough for commuting, the ExpiliOn mounts on your handlebar and includes seven lighting modes, USB charging, and a low battery indicator.


  • One-piece design:
    • No wires or external batteries for quick mounting
    • Only 130 grams, including internal battery
    • Durable aluminum alloy bezel
    • Weather tight design ensures all condition use
  • Cree LED technology:
    • Super-bright Cree H.B. LEDs for maximum brightness
    • H.B. LED durability eliminates bulb replacement
    • White beam color resembles daylight
  • Quick-release lithium ion battery stick:
    • Internal, rechargeable lithium ion battery
    • Last up to 24 hours on a single charge
    • Swap the battery on the move for longer rides
  • Control button with built-in power indicators:
    • Illuminated button is conveniently located on top of light for easy access
    • Integrated low battery and charging status indicator
  • Precision optics:
    • Maximizes spread and beam pattern specifically for cycling
    • Seven lighting modes
  • USB charging:
    • Charges from USB port of computer or electrical outlet
    • Charging indicator
    • Wall charger compatible with 100V to 240V for use worldwide


  • One LED bulb with 350 lumens
  • Five-hour charge time
  • 130-gram weight
  • Run times:
    • Two hours on "boost"
    • Three hours on high
    • Six hours on medium
    • 13.5 hours on low
    • 24 hours on flash

Cygolite lighting systems include a limited one-year manufacturer's warranty against defects in materials and workmanship.

About Cygolite
In 1991, a group of cycling engineers sought to use their technical expertise to develop more advanced bike lighting systems, and Cygolite was formed. The company consistently adapts emerging technology, blended with clean and classic designs, to create a line of quality, innovative bike lights.

Product Details

  • Product Dimensions: 7 x 2 x 5 inches ; 8.8 ounces
  • Shipping Weight: 8.8 ounces
  • Domestic Shipping: Item can be shipped within U.S.
  • International Shipping: This item is not eligible for international shipping. Learn More
  • ASIN: B005DVA37Q
  • Item model number: EXP 350 USB
  • Average Customer Review: 4.6 out of 5 stars  See all reviews (192 customer reviews)
  • Amazon Best Sellers Rank: #207,972 in Sports & Outdoors (See Top 100 in Sports & Outdoors)
  • Product Warranty: For warranty information about this product, please click here

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Customer Questions & Answers

Customer Reviews

Most Helpful Customer Reviews

104 of 105 people found the following review helpful By Amazon Customer on December 8, 2011
Verified Purchase
This is a great light -- my previous light was a Planet Bike Blaze 2 watt light and though that one was pretty good on city streets, I wanted something brighter for rainy nights so I can see the road (and potholes) more clearly.

This Cygolite is definitely what I was looking for. On most (non-rainy) nights, I use the Low setting since that still allows me to see the road clearly -- the Planet Bike Blaze on its "high" setting is just a bit brighter than the Cygolite on low. But once I switch to medium or high, the Cygolite is *much* brighter than the Blaze.

The beam pattern is good, it illuminates the road well with enough spillover to let me see reflective streetsigns several blocks away.

I haven't run the batteries down yet, I've only used it for about a week (around 4 or 5 hours of use). Since it's rated for 6 hours at medium, I'll probably just recharge it every week and won't have to worry about it ever running out of power.

When I read that it had 7 modes, I was worried that I'd have to cycle through all 7 modes just to change brightness. It turns out that only 5 of those modes are normally available, so it's only necessary to switch among those 5. The other two are special modes that you get to by holding down the power button longer when turning on the light.

The modes are:

1. High - very bright, much brighter than I need in normal use, but maybe useful in the rain (3 hours rated battery life)
2. Medium - gives great visibility, good battery life (6 hours rated life)
3. Low - gives decent visibility of the road, great visibility to cars (13.5 hours rated life)
4. Boost - extremely bright, noticably brighter than "high".
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28 of 29 people found the following review helpful By Happy on December 7, 2011
Verified Purchase
I purchased this light after struggling to see potholes and other road debris at night with my old light and I couldn't be happier. Running over stuff with a road bike tire (or into a pothole) turns my stomach every time, and this light casts a beam far enough I can easily avoid stuff even when cycling over 20mph. I know, most people get a light so cars can see them, and this does that too, but if you're a road cyclist where the roads are crappy (like here in Southern California) this is a must-have. Easy mounting with multiple hardware options, lightweight, easy to slide off if you're running into the store real quick, and USB CHARGING!!!! Happy cyclist!
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23 of 25 people found the following review helpful By H. Dinh VINE VOICE on March 1, 2012
Verified Purchase
I wanted to love this light. The first week I had it , I was totally happy. It put out so much light for a compact light that I thought this was it, my last bike light purchase ever. at maximum output, it lit up the whole trail and I can actually see pot holes and cracks on the road. Until the last ride, 5 weeks old and 1 week out of Amazon return window. I could not turn the thing off after the ride. The button was so hard to push. I pushed, held the switch and nothing happened. Pull the battery out so I can drive home and not having the inside of my car all lit up. No idea what I did, but the light turned off finally. Why can people make light with dial or rocker switches?

All in all, I had about 10 rides. Now I am looking for another light.

Update: 3/14/12

After I wrote this review a few days, I took the bike and light out for a ride and the light was back to work as it should be. The switch is still hard to operate, but works so I upgraded it to 3 stars instead of 2.

May be I just got a bad one, so you should not be discouraged from purchasing this light. It really put out amazing amount of light, you can see the reflectors on people's shoes 100 yards away! And there is no mistake they know you are coming. Compact light this powerful usually costs couple of hundred dollars instead of around $70.
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12 of 13 people found the following review helpful By Baughman on September 29, 2012
Length: 2:29 Mins
My main qualm with the Expilion 350 is that the beam is too narrow (not necessarily that it's not bright enough). See video for comparison to Lumina 650.

If you are riding slow enough and in a straight enough line, I'm sure this light will more than suffice. However, if you are making tight turns on unlit trails, you might want to check out the Lumina 650 or the Expilion 700. From what I've read online though, the Expilion 700 does not provide as wide of a beam as the Lumina 650. I wish I had been able to provide that comparison.

All three lights in the video had fresh batteries.
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14 of 16 people found the following review helpful By W. Nicholls on January 17, 2012
Verified Purchase
The Cygolite Expilion 350 appears to be a great little light, and it's a good value here compared to the 400 version. I didn't see a helmet mount in the product description as there is in the 400's, but there were two reviews here that referenced the helmet mount. To be clear, the 350 doesn't include the helmet mount. The instruction sheet and box both indicate that the helmet mount comes only with the brighter, more expensive model.

Cycolite sells parts and extra batteries on their website. I ordered the helmet mount (part number HLMT-DCV6) which costs $15 plus $4 shipping. If you're comparing the 350 and 400 versions of the Expilion, the differences are the output and this mounting option. An extra battery goes for nearly $30 in case you were wondering.

Note that the box for the Expilion lights suggest that you can charge them via a notebook computer's USB port. The instructions, however, warn you only to use the cord and charger that come with the light. Frankly, if it's true that using another USB cord or port to charge the light can damage it, then the whole USB connection feature is pretty much pointless.

More light modes aren't always better. You have to do five button presses to activate the flashing mode, for example. How annoying this is depends on what modes you use the most.

The mounting bracket uses a rectangular rubber pad with adhesive backing. The adhesive isn't good for multiple uses, so if you want to switch the mount between bikes with different diameter handlebars, be aware that the rubber pad will be extra hassle to deal with. I started out with the wrong diameter insert and had to peel off the pad. The adhesive layer peeled away from the pad, so I had to come up with some sticky stuff to remount the pad.
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