Broncolor Siros L 400Ws Battery-Powered Monolight

Broncolor Siros L 400Ws Battery-Powered Monolight

Broncolor Siros L 400Ws Battery-Powered Monolight

B&H # BRS400LWFR2B MFR # B-31.710.07
Broncolor Siros L 400Ws Battery-Powered Monolight

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Expected availability: 7-14 business days

Product Highlights

  • 440 Full-Power Flashes
  • Li-Ion Battery
  • 70-Minute Recharge
  • 0.03 - 1.2 Sec Recycling
  • Speed Mode Flash Duration: 1/19000 Sec.
  • High Speed Sync w/ Optional Transmitter
  • 9-Stop Flash Range
  • Built-In Wi-Fi and RFS Receiver
  • bronControl App
  • Up to 50-Shot Flash Sequencing
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Power: 400Ws

400Ws 800Ws
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Broncolor Siros 400 L Overview

  • 1Description

The Siros L 400Ws 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 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

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 Siros 400 L Specs

Flash Head
Maximum Power 2 to 400 Ws
Power Control 9 Stops in 1/10-Stop Increments
Flash Duration t.1: 1/6200 to 1/400 Sec
t.5: 1/11,300 to 1/1200 Sec
Recycle Time 0.03 to 1.9 Sec ()
Color Temperature 5500K
Flash Ready Indicator Audio, Visual
Reflector Changeable
Accessory Fitting Type Broncolor
Modeling Light
Type LED
Wattage 25 W
Color Temperature 3000K
Sync Type Cable, Optical, Radio
Interface Micro-USB
Battery Chemistry Lithium-Ion
Maximum Output Voltage 28.8 VDC
Capacity (mAh) 2500 mAh
Flashes Per Charge 440 Flashes (Full Power)
Recharge Time 70 Minutes
Weight 1.3 lb / 0.6 kg
Display None
Auto Dump Yes
Operating Temperature 14 to 140°F / -10 to 60°C
Dimensions H: 7.1 x W: 5.1 x L: 12.6" / H: 18.0 x W: 13.0 x L: 32.0 cm
Weight 6.8 lb / 3.1 kg
Packaging Infodexqwcerdqbdazbrbz
Package Weight 15.5 lb
Box Dimensions (LxWxH) 22.8 x 11.4 x 10.3"

Broncolor Siros 400 L Reviews

Siros L 400Ws Battery-Powered Monolight is rated 3.0 out of 5 by 2.
Rated 3 out of 5 by from Not fully satisfied 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.
Date published: 2017-12-19
Rated 3 out of 5 by from Not fully satisfied The Modeling light does not proportionate with the Flash Power. It can only turn ON and OFF. Whereas the modeling light of Siros 400 S proportionate with the flash power.
Date published: 2017-12-19
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