Westcott FJ400 400Ws Strobe with AC/DC Lithium Polymer Battery

MFR: 4700

Starting at $55/mo

Need help deciding? Contact us right now!

In the box

Westcott FJ400 400Ws Strobe with AC/DC Lithium Polymer Battery

  • Westcott FJ400 400Ws Strobe
  • 14.8V 4,400mAh AC/DC Lithium Polymer Battery
  • Diffusion Dome
  • AC Power Adapter and Cord
  • 5.5-inch Magnetic Reflector with Bowen S-Type Mount
  • Magnetic Gel Set (3 Color Correction, 1 Diffusion)
  • Rapid Box Switch Insert (Bowens)
  • USB-C to USB-A Cable
  • Travel Case
  • 1-Year Limited Warranty

From The Wavelength Blog Read more

Westcott FJ400 400Ws Strobe with AC/DC Lithium Polymer Battery

Never miss a shot again. The Westcott FJ400 is the first portable 400Ws AC/DC strobe with under a second recycle speed at full power that offers an impressive 480+ full-power flashes per charge. The lightweight FJ400 Strobe offers unrivaled performance with the most accurate color temperature throughout its entire 9-stop output range. Trigger the flash with the Westcott FJ-X2m Universal Wireless Trigger or Canon RT system (available separately).

Controls and Functions

With an intuitive menu system and LCD color display, the FJ400 Strobe features Manual and TTL Flash Modes, High Speed Sync (HSS) up to 1/8000s, Freeze Sync up to 1/19000s, Continuous Capture up to 20 fps, Mask Function, Delay Function, Automatic Memory Recall, and much more. The removable lithium polymer battery provides both DC power for on-location freedom and AC trickle-charge performance when the state of charge is above 25%.

Adjustable Color Temperature

The Westcott FJ400 400Ws Strobe maintains a color temperature stability of 5500K (±150K) throughout its entire 9-stop output range, with flash increments of either 0.1 or 1.0 stops. It features a 20W 5600K LED modeling lamp with auto-adjust and independent output control. Designed with safety in mind, it is equipped with onboard self-monitoring cooling fans and an automatic shutoff feature to ensure safe operation during use.

Complete System

The extended flash tube provides optimal light output allowing for a wider, even spread for filling light modifiers. Equipped with a Bowens S-Type mounting system, the FJ400 can be easily paired with your favorite softbox. The strobe light also includes a magnetic 5-inch reflector, magnetic CCT gel set, and a Rapid Box Switch Bowens insert. The Bowens insert allows you to pair your strobe with any Rapid Box Switch light modifier.

Complete System

The built-in tilter bracket with a tension screw offers secure mounting and positioning of large umbrellas and modifiers. The included USB-C to USB-A cable lets you install firmware updates. A sleek travel case houses all of the FJ400 Strobe’s components for safe transport and storage. Pair the FJ400 Strobe with Westcott’s FJ-X2m Universal Wireless Trigger (sold separately) for revolutionary compatibility with most Canon, Nikon, Sony (with adapter), Fuji, Panasonic LUMIX, and Olympus cameras.


Accessory MountBowens Mount


Power Consumption400 W
AC Input Power100-240 VAC, 50/60 Hz, 1.6A


Battery TypeLithium Polymer


Weight5.44 lb

Light Fixture

Color Temperature5600K
Fixture Dimensions11.5 x 4.25 x 4.75 inches
Mount TypeBowens S

Same Day Shipping

All orders placed by 4PM( EST), Monday through Thursday, and by 11AM (EST) on Friday, are shipped same day. Orders placed outside these times will ship the next business day. We do not ship internationally or to Puerto Rico, Guam and other US territories at this time. For more details click here.

Free Two-Day Shipping

We offer free expedited shipping on thousands of items within the continental USA (this does not include Alaska and Hawaii).

Flexible, Easy Returns

If you're not happy with your purchase for any reason, our flexible 30-day free return policy makes it easy to get a full refund. Click here to view our return policy.

Ratings and reviews