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Broncolor Siros 400 L Battery-Powered Monolight

BH #BRS400LWFR2B • MFR #B-31.710.07
6 reviews
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Broncolor Siros 400 L Battery-Powered Monolight
Key Features
  • 440 Full-Power Flashes, 400Ws
  • Li-Ion Battery
  • 70-Minute Recharge
  • 0.03 - 1.2 Sec Recycling
The Siros 400 L Battery-Powered Monolight from Broncolor is the latest in the Siros series of monolights. Powered by a Li-ion battery, the flash head gets up to 440 full-power flashes on a 70-minute charge. The modeling light is a 25W LED to conserve battery power.
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Broncolor 400 L Overview

The Siros 400 L Battery-Powered Monolight from Broncolor is the latest in the Siros series of monolights. Powered by a Li-ion battery, the flash head gets up to 440 full-power flashes on a 70-minute charge. The modeling light is a 25W LED to conserve battery power.

Speed is central to the design of the Siros L. Recycling is a lightning fast 0.03 to 1.2 seconds, while normal t0.5 flash duration is as short as 1/11300 sec. There's also a Speed Mode that bypasses the Siros L's Enhanced Color Temperature Control to prioritize short flash durations and fast recycle speeds. The result is a flash duration of 1/19,000 at minimum power: fast enough to freeze water droplets and other stop action effects. The Siros L has a 9-stop variable power range from full power all the way down to 2 Ws. While at higher settings it's possible to out-flash the sun, lower settings allow use of even the widest apertures for your desired effect. All functions are available on the simple, intuitive panel via an ergonomic rotary controller, but you also have access to the menus and controls of up to 6 units using your tablet or smartphone and the free bronControl app.

The Siros 400 L features Broncolor HS for syncing at shutter speeds up to 1/8,000s. Broncolor HS requires an RFS2.2 transmitter, available for Canon, Nikon, and Sony cameras. Existing Siros owners should ensure that their lights have the latest user-upgradable firmware, available online at www.bron.ch/sirosfirmwareupdate/.

Siros L is Battery-Powered
A single fully-charged lithium-ion battery stores enough energy for a Siros 400 L to flash more than 440 times, and it does that at maximum power.
Siros L is Fast
In only 0.03 seconds, your Siros L is ready again. The flash duration can as fast as 1/9000 sec (t 0.1) or 1/19000 sec (t 0.5).
Cut-Off Technology
Flash duration and light output are the two decisive factors in light control. A microprocessor in Siros L will calculate the shortest flash duration for a given energy setting.
Speed Mode
In Speed Mode, fast charging and short flash times have absolute priority. In this case, the calculation of constant color temperature (ECTC) is suppressed for quick results.
Siros L is Simple
Very simple operation using the single rotary controller. Alternatively, you can use the advanced, intuitive app.
Siros L is Powerful
The high light output leaves no photographer standing in the dark. It can even challenge sunshine. And with a control range of 9 stops, you can still use wide-open apertures when needed.
Siros L is LED
With its low power consumption, the 25-watt LED module provides bright modeling light at a color temperature of 3200K. The light characteristics are absolutely comparable with the modeling light from a mains-operated Siros S.

Broncolor 400 L Specs

Key Specs
Item Type
1x Monolight
Includes Flash Tube
Yes
Included Light Modifier
1x Reflector
Included Storage Case
Yes
Power Range
2 to 400 Ws
 
Power Control
9-Stop Range in 1/10-Stop Increments
Recycle Time
0.03 to 1.9 Sec
TTL Metering
No
Modeling Light
25 W LED Built-In (3000K)
Wireless Remote Control Type
Radio/RF Receiver Built-In
Wi-Fi Built-In
Optical Receiver Built-In
Sync Speed
1/8000 Sec
Power Source
Battery (Included)
Inputs/Outputs
1x Barrel / Coax Female Flash Sync Input
1x USB-C Female Firmware Input
Battery
1x Rechargeable Lithium-Ion, 28.8 VDC, 2500 mAh (Included)
 • 440 Flashes at Maximum Brightness
 • 70-Minute Charge Time
Fixture Mounting
1x 5/8" Receiver
Weight
6.8 lb / 3.1 kg (Fixture without Battery)
8.1 lb / 3.67 kg (Fixture with Battery)
Light Fixture
Item Type
1x Monolight
Includes Flash Tube
Yes
Included Light Modifier
1x Reflector
Included Storage Case
Yes
Power Range
2 to 400 Ws
 
Power Control
9-Stop Range in 1/10-Stop Increments
Recycle Time
0.03 to 1.9 Sec
Color Temperature
5500K
Flash Ready Indicator
Audio & Visual
TTL Metering
No
Umbrella Mount
Yes
Front Accessory Mount
Broncolor
Replaceable Flash Tube
Yes (User Replaceable)
Modeling Light
Modeling Light
25 W LED Built-In (3000K)
Connectivity
Wireless
2.4 GHz Radio/RF 
Wireless Remote Control Type
Radio/RF Receiver Built-In
Wi-Fi Built-In
Optical Receiver Built-In
Mobile App Compatible
Yes: Android & iOS
App Name: bronControl
Wireless Channels
99
Wireless Groups
4
Wireless Frequency
2.4 GHz
Wireless Range
164' / 50 m (Radio/RF)
Flash Duration
t.1: 1/6200 to 1/400 Sec
t.5: 1/11,300 to 1/1200 Sec
Sync Speed
1/8000 Sec
Power & I/O
Power Source
Battery (Included)
Inputs/Outputs
1x Barrel / Coax Female Flash Sync Input
1x USB-C Female Firmware Input
Battery
1x Rechargeable Lithium-Ion, 28.8 VDC, 2500 mAh (Included)
 • 440 Flashes at Maximum Brightness
 • 70-Minute Charge Time
Battery Charging
1x AC to DC Adapter (Included)
Included Adapter / Cable
1x USA Type-A/B to Barrel / Coax Male AC to DC Adapter
Auto Dump
Yes
Mounting
Fixture Mounting
1x 5/8" Receiver
General
Display
No
Operating Conditions
14 to 140°F / -10 to 60°C 
Dimensions
12.6 x 7.1 x 5.1" / 32 x 18 x 13 cm
Weight
6.8 lb / 3.1 kg (Fixture without Battery)
8.1 lb / 3.67 kg (Fixture with Battery)
Packaging Info
Package Weight
15.5 lb
Box Dimensions (LxWxH)
22.8 x 11.4 x 10.3"

Broncolor 400 L Reviews

Outstanding product... but B&H

By Alivin
Rated 5 out of 5
Date: 2019-05-01

First and foremost, if you’re looking for the best. Look no further. Broncolor hands down. 2x 400 watts is more than enough to take over the sun here in sunny South Florida. And I shoot with 5D Mark IV and EOS R. I originally was using duo Profoto B10’s. But they just do not compare. The bronControl app is amazing. The Siros lights come with a usb to enable you to update their firmware. When doing film or LARGE SCALE creative photography I use both broncolor and Profoto. I attach the Profoto trigger right on top of the RFS 2.2 and it’s just INCREDIBLE. What I’m upset with is, this set is costly no matter who the photographer is. When it comes to me. I expect it to look like the money I spent. When I went to pick up the set from my local fedex office. They were complaining and I agree and see why. The box looked like garbage. Literally. I’m surprised the units weren’t broken and thank goodness they weren’t because I could’ve missed out on a magnificent product. B&H HANDLE THINGS WITH CARE. PLEASE.

Not fully satisfied

By Sanjib
Rated 3 out of 5
Date: 2017-12-19

The main problem of this Siros L serise, is the modeling light power does not proportionate with the flash power. For example even if the flash power is at 2.0, the modeling light will lit at full power.Whereas this facility is available with Siros series. This is a major drawback of this product. Other competitive brand like Profoto B1\B1X does have� this facility. Other than this disadvantage, this product is the best at this price range.

See any errors on this page?

Can I connect a PocketWizard to this?

Can I connect a PocketWizard to this?
Asked by: Darryl
Yes. The Siros L has a sync port which can be triggered by a plugged in receiver.
Answered by: broncolor USA Team
Date published: 2024-08-29

question

Does it support high sync?
Asked by: Felipe B.
Siros L does support 1/8000 shutter speed. You have to configure Siros L in Speed mode.
Answered by: Sanjib K.
Date published: 2018-08-27

Is the modeling lamp proportional to the flash ...

Is the modeling lamp proportional to the flash power? I mean is it possible to adjust it and make it proportional?
Asked by: Anna
The Siros L LED modeling lamp is a fixed power output and cannot be dimmed to be proportional with its flash power setting.
Answered by: dan@broncolor
Date published: 2023-10-01

Is this enough to light a 120 x 180 cm Softbox?

Is this enough to light a 120 x 180 cm Softbox?
Asked by: Nicholas
Yes. More than enough power to illuminate a 120x180 cm.
Answered by: hectorm
Date published: 2022-11-07
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