USL-1600 E-Lume 1600


SKU: USL-1600 / 713835993996

Quick Overview

The Serfas® USL-1600 E-Lume features a precision CNC machined aluminum head with dual LED forward lighting, heat sink cooling fins, and left and right side marker lights for extra side visibility. A high impact Nylon polymer body with USB charging port and integrated mount attachment point houses internal rechargeable Li-Ion batteries. The single On/Off/Mode button is surrounded by a discrete LED illuminated indicator which displays charging status and remaining battery level.


1101 in stock (can be backordered)




  • Compact Lightweight Aluminum Design
  • Super Bright (1600 Lumens) Output
  • Water Resistant Rating: IPX6
  • New 3 Level Battery Life Indicator
  • Last Mode Memory
  • Max Charges Rate of 2A
  • Charges from Dead to Fully Charge in 3 hours (Using 2A Rated Charger)


  • Solid Modes: Overdrive (1600 Lumens): 1.5 hrs, High (1000 Lumens): 2.5 hrs, Medium (700 Lumens): 4.5 hrs, Low (400 Lumens): 6.5 hrs
  • Flash Modes: Daytime Flash (1600 Lumens): 35 hrs, Low Flash (200 Lumens): 20 hrs
  • Weight: 240 Grams with Bracket
  • Battery: LG® 2-Cell Li-Ion, 2600mAh


  • Micro USB Cord
  • Handlebar Mount


15 reviews for USL-1600 E-Lume 1600

  1. Dave Simmons

    It’s a great light, however, I have a wireless computer on my bike and when I turn on the light…the computer stops working.

    • Serfas

      Hi Dave, Thank you for your feedback. The situation you have described indicates an EMI (Electro Magnetic Interference) scenario between your wireless computer and our high-output headlight. This can occur when electronic shielding in either device leaks these invisible signals. Our recommendation is to relocate the light and/or computer far enough away from each other on the bike that interference no longer occurs. We apologize for the inconvenience.

  2. Art SANCHEZ

    Wow, Just got it but so far am truly impressed.Commute to work in the dark morning and ride home when it gets dark, with no pun intended this is the brightest part of the ride. Bought a Lumina 900 and battery life was subpar and not a very good pattern. Rode the 1600 e-lume on high thinking it was on overdrive until I pressed button and all I could say was Wow

    • Serfas

      Hi Art, We are happy to hear you are enjoying your new USL-1600 E-Lume headlight and that its performance has exceeded expectations! We thank you for your feedback and are glad to be able to help brighten up your commute. – The Serfas Team

  3. Josh Callaveri

    Same light from is only $40. I have been through three in the last 9 months. Pretty much just cheap Chinese junk. Buyer beware.

    • Serfas

      Hi Josh, Thank you for bringing this to our attention. Our Serfas lights are high quality products manufactured to meet high performance standards. Our Product Development Team tests our lights in-house to make sure they meet, and often even surpass, performance expectations. It is unfortunate that because we offer such a successful and high quality product that sub-par imitations are occasionally found outside of the United States market using lesser quality components and lower standards of construction. We are sorry to hear about the three imitation lights that failed on you and encourage you to try a genuine Serfas USL-1600 E-Lume light! – The Serfas Team

  4. Jeff

    Forgot my helmet mount on a night ride and my old bar mount headlight was not enough. When I was able to hold my pal’s wheel I was so impressed with his Serfas light (and in the dark as soon as I got dropped) I had to get one.

    Construction is rock solid and form is attractive comparing to my Nite Rider and Lezyne lights, not to mention it’s bright as you need it and the battery will probably outlast your night riding. I like the on/off button timing too — minor detail but some buttons need to be held awkwardly long or turn on accidentally without a hold function.

    The bar mount is adjustable for different diameters, and the clamp is, in my experience, the easiest to mount/dismount, and then it’s absolutely glued to the bars. So much so that you’ll have to unlatch it to make small pivot adjustments. At 240g it’s reasonably light enough for helmet mounting too.

    Look no further for a mountain or road headlight!

    • Serfas

      Hi Jeff, Thank you for your positive feedback – We are always excited to hear from satisfied customers who are enjoying the performance and quality of our products! – The Serfas Team

  5. Daniel

    This is my first light for my new addiction of winter fatbike night riding…..or I should say with this light its daylight riding even at night. Absolutely amazing light, length of battery life is very impressive. As Jeff mentioned above your mount is crazy good and strong, well done on this product…..worth EVERY penny spent for this baby.

    • Serfas

      Hi Daniel, Great to hear you are enjoying your new E-Lume light! Nothing like a BIG amount of light for a FAT bike! Enjoy your newfound “daylight” nighttime rides! 🙂 – The Serfas Team

  6. Don

    Really impressed by the brightness, beam spread, clamp force and longevity of the light. The light will blow you away! The clamp allows the light to stay firmly in place and focused on the road/trail. Most light I’ve used fail at this when hitting bumps, but not this light. The only thing I might offer constructively and am nitpicking; is the clamp could be dampened a little more to reduce noise from high frequency chatter when travelling at speed on high pressure tires over small asphalt bumps. In particular the junction between top and bottom portions of the swivel. Keep in mind I am a gear snob who works in a bike shop and has used MANY lights and serfas is my favorite due to price/quality ratio and clamp strength/integrity.

    • Serfas

      Hi Don, We appreciate your loyalty sticking with Serfas® as your go-to for lights and especially appreciate your insightful feedback regarding potential future mount updates to reduce vibration and noise at high speeds. Ride on! – The Serfas Team

  7. aaron gerth

    The best rechargeable light on the market hands down. Serfas made a great light in this powerhouse, 1600 lumens in a dual beam. Great lighting pattern to pick your way through turns twisty singletrack if you’re riding mtb. If you’re logging miles in the asphalt this thing kicks out some serious light to see the road in front of you and more importantly to be seen by other pavement users. I especially liked that I got flashed by an approaching cars headlights as my light was too bright. That was a first!

  8. Clayton

    Hi guys just updated my Serfas e-lume to a USL -1600 oh man this light is totally awsome I’ve given my son my other serfas light for his bike but the usl -1600 is probably one of the best on the market I recommend these lights to anyone who rides a bike I’ve put this one on my Electra 8 ball cruiser it certainly turns night into day great for the nite rides keep up the good work serfas best lights ever regards Clayton

    • Serfas

      Clayton, Thanks for the kind words! Great to hear how pleased you are with trusting Serfas for your illumination needs, hope your son enjoys your old light as much as you have! Take care :] – The Serfas Team

  9. Andy Mercer

    Great light. great power. Is it safe to charge at 3.1A. Thanks.

    • Serfas

      Hi Andy, The E-Lume 1600 has built-in circuitry that will regulate and limit charging amps to 2, so yes it can be safely charged with a 3.1A charging source.

  10. David Lanteigne

    amazing products, i started with the e-lume 900 on my handle bars 4 weeks ago. started riding more evening rides so i relocated the 900 to the helmet and placed this e-lume 1600 on the handle bars. incredible illumination. ill never cheap out where quality products are required. Serfas lights will prove themselves worth every penny! i rode up on another cyclist in the trails, we stopped and chatted, his absolute first comments were regarding the brightness of my lights. lol.
    thanks for a quality product, i’m sure the lifespan of the lights will follow. only time will tell.

  11. Robert Culver

    Bought after many happy years with other Serfas headlights – this unit provides good forward light for trail mountain bike riding – whilst there are other units more powerful out there but you get into the split headlight-battery pack issue – I have found this split awkward. This unit has worked well after some quite heavy rain – no water penetration probblems- the bike attachment system is good – not moving at all after a fall. I really like that Serfas has stuck to the same mounting hardware clip over many years so you can ‘mix and match’ headlight units – next headlight likely to be a Serfas again.

  12. Tom

    I live in the subarctic where pretty much all my winter fat biking is in the dark on trails. I have an e-lume 1600 which is excellent for my application. I normally ride with the 1600 in low mode but it sure is nice to have the extra lumens for sections of the trail where you need it. I also have an e-lume 900 for my kids fat bikes, and after two years of regular, seasonal use both look and work like new. As others mentioned, the mounting clamp is simple and works superbly. I can’t fathom needing anything else – I love these lights. Thanks.

    • Serfas

      We love to hear stories like this, so rad! Thanks for sharing, Tom 😀 – The Serfas Team

  13. Adam

    Excellent light – have used for 2 years now. I’ve got a number of different lights from various makers – this is my favorite hands down. Don’t always need all 1600 lumens, but always glad to have them when I do.

  14. Tim Claes

    Most excellent light! I have had it for 3 yrs. Commuted over 3000 miles on it. In ’17 it was the highest lumens light without external battery. There are some higher lumens units from competitors but 1600 is more than plenty (more than high beams of your car) and this one seems to have a longer runtime, has an excellent wide beam and a higher lumens day flash. I love the 1600 lumens day flash! It laterally stops cars in their tracks that are about to cut you off. I have used it now a couple of times to do some single track MTB trails and it’s also suitable for that. Small cons: my battery failed after 11 mo, customer service replaced it. Excellent service. Handlebar clip wore out (unit slumped back or forth) until it broke. I used the spare clip from the replacement unit that was sent to me at 11 mo. Small lip of the charge port rubber cover broke off. Now I have to pierce with a needle to open the charge port. That means it’s prob not waterproof anymore but should be fine because it’s on the underside and I don’t dunk my light under water. Despite those cons if I would have to replace it now I would buy the exact same unit again

    • Serfas

      Tim, Absolutely fantastic to hear how well the E-Lume has been for you as a solid lighting platform while you pile on the miles! We greatly appreciate your feedback and for choosing Serfas products. Cheers to another 3000 miles! – The Serfas Team

  15. James Grover

    My USL-1600 E-Lume 1600 has developed a faulty recharging problem, and although it is still fairly new and hasn’t had much use, doesn’t work anymore.
    Good lights while they are going, I have two.

    • Serfas

      Hi James, Sorry to hear about your USL-1600 having faulty charging issues! The simplest reason for this can often be attributed to a usb charging cable that’s gone bad, but if you’ve already tried charging with another cable and/or charger and it hasn’t solved the problem for you please contact our warranty department if you haven’t already done so so we can help you out. Email: / Phone: 623.888.5841 – The Serfas Team

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