Broncolor Siros 800 L Battery-Powered Monolight

BH #BRS800LWFR2B • MFR #B-31.720.07
Key Features
  • 800Ws, 220 Full-Power Flashes
  • Li-Ion Battery
  • 70-Minute Recharge
  • 0.03 - 2.7 sec Recycling
The 800Ws Siros 800 L Battery-Powered Monolight from Broncolor is the latest in the Siros series of monolights. Powered by a lithium-ion battery, the flash head gets up to 220 full-power flashes on a 70-minute charge. The modeling light is a 25W LED to conserve battery power.
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Expected availability: 2-4 weeks
$214/mo. suggested payments
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Broncolor 800 L Overview

  • 1Description
  • 2Siros L is Battery-Powered
  • 3Siros L is Fast
  • 4Cut-Off Technology
  • 5Speed Mode
  • 6Siros L is Simple
  • 7Siros L is Powerful
  • 8Siros L is LED

The 800Ws Siros 800 L Battery-Powered Monolight from Broncolor is the latest in the Siros series of monolights. Powered by a lithium-ion battery, the flash head gets up to 220 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 2.7 seconds, while normal t0.5 flash duration is as short as 1/7400 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 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 2Ws. 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.

Siros 800 L features Broncolor HS for syncing at shutter speeds up to 1/8000s. 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 800 L to flash more than 220 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 1/4400 sec (t 0.1) or 1/7400 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 25W 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 800 L Specs

Flash Head
Maximum Power4 to 800 Ws
Power Control9 Stops in 1/10-Stop Increments
Flash Durationt.1: 1/4400 to 1/250 Sec
t.5: 1/7400 to 1/700 Sec
Recycle Time0.03 to 2.7 Sec
Color Temperature5500K
Flash Ready IndicatorAudio, Visual
Accessory Fitting TypeBroncolor
Modeling Light
Wattage25 W
Color Temperature3000K
Sync TypeCable, Optical, Radio
Built-In Wireless ReceiverYes
Battery ChemistryLithium-Ion
Maximum Output Voltage28.8 VDC
Capacity (mAh)2500 mAh
Flashes Per Charge220 Flashes (Full Power)
Recharge Time70 Minutes
Weight1.3 lb / 0.6 kg
Auto DumpYes
Operating Temperature14 to 140°F / -10 to 60°C
DimensionsH: 7.1 x W: 5.1 x L: 14.0" / H: 18.0 x W: 13.0 x L: 36.0 cm
Weight8.2 lb / 3.7228 kg
9.3 lb / 4.2222 kg, Including Battery
Packaging Info
Package Weight17 lb
Box Dimensions (LxWxH)22.5 x 11.5 x 10.3"
See any errors on this page? Let us know



It is possible to use connected to the grid?
Asked by: Anonymous
It is possible to use grids with this monolight with the help of the Broncolor Standard Reflector for Siros and Siros L Monolights B&H # BRRL40 and the grid set for it which is the Broncolor Honeycomb 3 Grid Set for L40 Reflector B&H # BRGS3L40. Please see the images below for reference.
Answered by: Kirk R.
Date published: 2018-08-26

where do I connect the pocket wizard to the ...

where do I connect the pocket wizard to the Siros?
Asked by: Toan
If you look at the "Guides & Manuals" link under the "In The Box" section under the Overview tab on our website for the Broncolor Siros L 800Ws Battery-Powered Monolight, B&H # BRS800LWFR2B, page 3 shows the location of the sync socket, labeled as #6 on the image. It is located on the bottom of the unit next to the mini-USB port and across from the Mains power switch. The monolight has a 1/8" (3.5 mm) miniphone sync terminal. You would connect the PocketWizard MM1 Miniphone to Miniphone Cable -12", B&H # WICMM16, from the sync terminal on the flash to the sync terminal on your PocketWizard transceiver/receiver.
Answered by: Manzell
Date published: 2018-11-18


Can I use it with Sony A99 or Sony A7R II?
Asked by: Gustavo
You can use the Broncolor RFS 2.1 Transceiver B&H # BRRFS2T with your Sony A99 and A7R II to trigger the Siros L 800. Please see the image below.
Answered by: Kirk R.
Date published: 2018-08-27

I have five of these siros 800 L lights which are ...

I have five of these siros 800 L lights which are fantastic and 10 batteries. I am wondering if there is some sort of charging dock that can charge multiple batteries at the same time. At the moment I have 5 seperate chargers which is a lot of cords to plug in.
Asked by: Dan
Thanks for your question and support of broncolor! Unfortunately at this time a multi-dock solution is not available but we will certainly share it with our product planners.
Answered by: [email protected]
Date published: 2020-03-05

Does this strobe have TTL?

Does this strobe have TTL?
Asked by: johnny
No, just High speed sync with Optional Transmitter
Answered by: Joseph
Date published: 2021-01-17


Are theses unit RFS? If so is it 2.1 or 2.2? Will they work with Pocket Wizards?
Asked by: Fabio
The monolights in this kit utilize the Broncolor RFS 2.1 receiver which cannot be triggered with a Pocket Wizard unit. However, you can connect a Pocket Wizard unit to the monolight and trigger them using another Pocket Wizard unit on camera.
Answered by: Kirk R.
Date published: 2019-06-30


What mount does this strobe use?
Asked by: Yi Fan C.
This strobes utilizes the Broncolor Pulso mount, which will fit the current line up of Broncolor modifiers.
Answered by: Kirk R.
Date published: 2018-08-26

If i have MOLA dishes with bowens mounts, is ...

If i have MOLA dishes with bowens mounts, is there a bowens mount option for these lights and will they be able to hold the weight of a MOLA setti 28inch as well as the 43inch Manti? Thanks
Asked by: Carlos
The Bowens S-mount speedring is not compatible for use on Broncolor monolight strobes. If you need a Mola speedring for your Mola beauty dishes that is compatible for use with the Broncolor Siros 800 monolight strobes listed above, you may purchase the Mola Speed Ring for Broncolor Pulso, B&H # MOSRBP, for your usage needs.
Answered by: Manzell
Date published: 2021-04-29
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