broncolor Siros 400 L Outdoor Kit 2

Add Your Review

Stock Status

SKU: 31.750.XX
Categories: Studio To-Go Kits, Monoheads, Battery flash lighting


This Siros 400 L is the most powerful battery-operated monolight to date. It outshines other lighting solutions with its cable-free, compact design that excels in speed and performance.

It packs a punch of broncolor lighting power, capable of delivering more than 440 flashes from its single lithium-ion battery. Thanks to its low power consumption, this Siros L's 25 Watt LED modelling light, can shine brightly with a colour temperature of 3000 K, matching the modelling light of a mains-operated Siros S. This Siros L hosts an exposed flash tube allowing superior functionality of open reflectors, Softboxes, Paras and other parabolic light shapers. The power of this lighting system is more than obvious, with its output of up to 400 J, dominating light control. It's output ranges from high, outshining daylight, to low, delivering good results even for wide apertures. It hosts a microprocessor that determines the fastest flash speed for a set energy. Thanks to this Siros L, you'll be able to fully utilize any aperture.

This Siros L carries the same Enhanced Colour Temperature Control (ECTC) as the Scoro and Move power packs. The ECTC controls flash curve, allows high-speed flashes and ensures consistent colour temperature independent of setting adjustments. In Speed Mode, this Siros L reduces ECTC processing to shoot out flashes as fast as it can. Achieving lightning speed, this Siros L blasts light at above 50% intensity for 1/19000s (1/9000s above 10% intensity), while requiring a mere 0.03s rest between flashes.

The design of this Siros L compliments its size and weight perfectly. It has a single-piece aluminium exterior and a carrying handle that doubles as a floor stand. It also integrates an umbrella mount alongside the stand adapter, allowing full focus range with an umbrella. With consistent colour, high-speed flash capabilities and versatile control, this Siros L matches the light quality of most power packs and works exceptionally well with them. This Siros 400 L will fit right in with the rest of the broncolor family - sharing compatibility with the many light shaper accessories, including the two newly developed reflectors, specifically designed for the Siros.

All Siros L's power is contained within its single lithium-ion battery. Only a few centimetres in size and weighing a mere 0.6kg, the battery will allow this Siros 400 L to produce up to 440 full-power flashes ... 1700 flashes at an output of 2 f-stops less. Three LEDs indicate battery life. Once discharged, the battery can be charged and ready to go again in only 70 minutes. Implementing the latest advances in lithium-ion technology, this battery offers the shortest charge time for its resulting power. Built to follow the Siros L into the toughest shoots, it will survive temperatures down to -10 degrees Celsius and up to a scorching 60 degrees Celsius. The Siros L is designed in such a way that the battery can be efficiently removed and inserted, using only one hand.

This Siros L is a battery-powered compact powerhouse, carrying the legacy of the Siros S, Siros studio lights and 50 years of the best lighting systems in world. Compact, battery-powered, bright and durable, this Siros L is the most versatile lighting solution ... the only lighting solution you should consider. Order yours now.

This Siros 400 L Outdoor Kit 2 offers two Siros 400 L units with everything you need to start shooting right off the bat. With two units as well as light shapers, this is a complete kit, designed for challenging shoots.

Thanks to the latest software update, this Siros L features HS functionality and will keep up with your camera's very fast exposures. You'll be able to add controllable light (to fill in or set your accents) to an intentionally underexposed scene even if it's captured at 1/8000s through a wide aperture.

This Siros L can be easily controlled via the on-board turn-dial, wirelessly via the bronControl app or with the separately sold RFS 2.2 Transmitter. With its own independent network, wireless control of this Siros L is possible anywhere. Manual control is just as simple, as the ergonomic dial allows for quick adjustments between 9 f-stops or even slow, precise 1/10 f-stop adjustments. The dial doubles as a button and can be pressed to switch between menu options.

The bronControl App is free to download for your phone and your desktop.

Note: RFS 2.2 transceiver sold separately

bronControl Update (published: 2 August 2017)


Siros L - Battery Powered Studio Quality


Flash energy

400 J

f-stop at 2m distance, 100 ISO


with reflector L40

22 5/10

with reflector P70

32 5/10

Flash duration t 0.1(t 0.5)

with optimum colour temperature

min. energy

1/6’200 s (1/11’300 s)

max. energy

1/400 s (1/1’200 s)

Charging time (at 28.8V)


(for 100% of selected energy)



0.04 – 1.9 s


0.03 – 1.2 s

Number of fl ashes per battery charge

440 at full energy

Setting range for flash energy

up to 9 f-stops in 1/10th, or full f-stop steps


2 – 400 J

Colour temperature


max. energy/P70

5’500 K

Modelling light

25 W LED

Colour temperature

3’000 K

Flash release

Manual trigger button, photocell, sync cable, with integral broncolor RFS 2.1

Remote control

Using “bronControl” app for mobile devices or RFS 2.1 transmitter

Ready display

Visual and acoustic (can be switched off)

Other features

Sequences (flash series) up to 50 flashes

Integrated umbrella holder and umbrella reflector included in scope of delivery

USB connection for software updates

Speed mode for fastest flash duration

Dimensions (l × w × h)

32 × 13 × 18 cm (12.6 × 5.1 × 7.1")

Weight unit (without battery)

3.1 kg (6.8 lbs)

Dimensions (l × w × h) battery

8.5 × 11 × 5.5 cm (3.3 × 4.3 × 2.2")

Weight battery

0.6 kg (1.3 lbs)

Li-ion battery

28.8 V / 2.5 Ah / 72 Wh

Operating temperature range

−10° C bis +60° C

2x Siros 400 L

1x battery charger

2x lithium-ion batteries

1x umbrella silver/black Ø 85 cm

1x Softbox 60 × 60 (cm) incl. adapter ring

1x sync cable 5 m

1x Outdoor trolley backpack

Write Your Own Review

You're reviewing: broncolor Siros 400 L Outdoor Kit 2