The Professional's Source Since 1973
  • Help
Ask Our Experts800.606.6969
Used
Hello, Log InAccount & Orders

Join Bild Expo 2025 - Presented by B&H

Broncolor Siros 800 L Battery-Powered Monolight

Used Cat #3128396 • MFR #B-31.720.07
Print
Key Features
  • 800Ws, 220 Full-Power Flashes
  • Li-Ion Battery, High-Speed Sync
  • 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.
More Details
Used
Warranty: B&H 90 Days
In Stock
Free Expedited Shipping
Ask an Expert
800.606.6969

Broncolor B-31.720.07 Overview

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 www.bron.ch/sirosfirmwareupdate/.

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 B-31.720.07 Specs

Key Specs
Item Type
1x Monolight
Includes Flash Tube
Yes
Included Light Modifier
1x Reflector
Included Storage Case
Yes
Power Range
4 to 800 Ws
 
Power Control
9-Stop Range in 1/10-Stop Increments
Recycle Time
0.03 to 2.7 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 Micro-USB Female Firmware Input
Battery
1x Rechargeable Lithium-Ion, 28.8 VDC, 2500 mAh (Included)
 • 220 Flashes at Maximum Brightness
 • 70-Minute Charge Time
Fixture Mounting
1x 5/8" Receiver
Weight
8.2 lb / 3.72 kg (Fixture without Battery)
9.3 lb / 4.22 kg (Fixture with Battery)
Light Fixture
Maximum Watt/Seconds
800 Ws
Control Range
9 stops in 1/10 or full-stop intervals (4-800Ws)
Guide Number
With L40 Reflector: f/32+8/10 at 6.5' (2 m) and ISO 100
With P70 Reflector: f/45+6/10 at 6.5' (2 m) and ISO 100
Recycle Time
Eco Mode: 0.05 to 4.3 sec
Normal: 0.03 to 2.7 sec
Flash Duration
Min. Energy: 1/4400 sec (t 0.1) / 1/7400 sec (t 0.5)
Max. Energy: 1/250 sec (t 0.1) / 1/700 sec (t 0.5)
Speed Mode:
Minimum Energy: 1/8700 sec (t 0.1) / 1/18000 sec (t 0.5)
Maximum Energy: 1/250 sec (t 0.1) / 1/700 sec (t 0.5)
Color Temperature
Max. Energy with P70: 5500K
Item Type
1x Monolight
Modeling Light
25W LED, 3000K color temperature
Triggering
Manual trigger button, photocell, sync cable, built-in Broncolor RFS 2.1 receiver
Remote Control
Using bronControl app for mobile devices, or RFS 2.1 transmitter
Flash Ready Indicator
Visual and audible (switchable)
Power
Li-Ion Battery: 28.8 V / 2.5 Ah / 72 Wh
Charging: 70 minutes
Full-Power Flashes: 220
Includes Flash Tube
Yes
Other Features
Sequences (flash series) up to 50 flashes
USB connection for software updates
Speed Mode for fastest flash duration
Included Light Modifier
1x Reflector
User Replaceable Flashtube
Yes
Changeable Reflector
Yes
Included Storage Case
Yes
Auto Dump
Yes, when power is reduced
Operating Temperature
14 to 140°F (-10 to +60°C)
Dimensions
Head: 14 x 5.1 x 7.1" (36 x 13 x 18 cm)
Battery: 3.3 x 4.3 x 2.2" (8.5 x 11 x 5.5 cm)
Power Range
4 to 800 Ws
 
Weight
Without Battery: 8.2 lb (3.7 kg)
Battery: 1.3 lb (0.6 kg)
Power Control
9-Stop Range in 1/10-Stop Increments
Recycle Time
0.03 to 2.7 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
Flash Duration
t.1: 1/4400 to 1/250 Sec
t.5: 1/7400 to 1/700 Sec
Sync Speed
1/8000 Sec
Power & I/O
Power Source
Battery (Included)
Inputs/Outputs
1x Barrel / Coax Female Flash Sync Input
1x Micro-USB Female Firmware Input
Battery
1x Rechargeable Lithium-Ion, 28.8 VDC, 2500 mAh (Included)
 • 220 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
14 x 7.1 x 5.1" / 36 x 18 x 13 cm
Weight
8.2 lb / 3.72 kg (Fixture without Battery)
9.3 lb / 4.22 kg (Fixture with Battery)

Broncolor B-31.720.07 Reviews

See any errors on this page?
Whatever You Need, We've Got It