USM-350 E-Lume 350 Headlight


SKU: USM-350 / 713836004851

Quick Overview

The All New 2021 Serfas® E-Lume Series Headlight

New for 2021 our E-Lume Series Headlights feature a redesigned extruded aluminum housing, new optical lens with excellent side visibility, and improved battery capacity and LED performance.

We made not only increased performance a priority but also improved rider visibility, so we designed an all new optical lens and housing with front corner cutouts to allow drastically more light be visible when viewed from either side – and this all without any reduction in quality of forward illumination or beam pattern.

Constructed of aluminum the E-Lume housing is strong and lightweight as well as an efficient thermal conductor which effectively reduces heat buildup thus helping maintain temperatures for optimal battery performance and consistent light output.

Light output of the E-Lume 350 is sent through a single optical lens creating a powerful beam with strong front illumination and excellent side visibility.

E-Lume Headlight User Manual (PDF)

5150 in stock (can be backordered)



Limited Lifetime Warranty
Serfas® warrants to the original purchaser that the product is free of defects in material, construction, and/or workmanship for the lifetime of the product.

Battery Warranty – One Year Coverage
Serfas® batteries are covered by a 1 year warranty from the original date of purchase.


  • All-In-One Design
  • Extruded Aluminum Body
  • Press and Hold Button Lock
  • Daytime Flash Mode
  • Up To 90 Hours Runtime
  • Integrated USB Rechargeable Li-Ion Battery
  • Backlit Button Indicates Charge Status and Low Battery
  • Handlebar Bracket
  • USB Charging Cable


  • Solid Mode:
    • High – 350 Lumen / 3 hrs
    • Medium – 150 Lumen / 7 hrs
    • Low – 75 Lumen / 15 hrs
  • Flash Mode:
    • Daytime Flash – 350 Lumen / 75 hrs
    • Low Flash – 50 Lumen / 90 hrs
  • Weight : 142g w/ Bracket
  • Battery: 2600 mah 1-Cell Li-Ion
  • 1600 mah
  • Charge Time: 2.5 hrs To Full At 700mA Using USB Wall Charger
  • Color: Black

E-Lume Headlight User Manual (PDF)

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1 review for USM-350 E-Lume 350 Headlight

  1. Michael Foreman

    Lights are great and simple to mount. I have bought several of these lights. My only gripe is that I have also had to buy several replacement straps for the lights. Eventually, the metal pin wears right through the rubber and then you are left with a great light without a usable mount. Luckily, you are able to purchase the straps for $3 each, which is affordable. It is better than having to buy a completely new light. Still it is an annoyance. So, buy some extra straps when you purchase the light so you don’t want to wait to fix it. For this reason alone, I give it three stars because it has happened on every one of these lights. You want your light to be tight so it doesn’t wiggle on rough roads, but you have to keep it a little loose if you don’t want the strap to wear out quickly.

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