The Broncolor Move 1200L is known for being what almost amounts to a small battery-powered Scoro pack for both location and studio use. It takes a lot of its bigger brother's features and packs them into a small yet powerful pack (for more on how I use the Move 1200L, check out my guest post on the Hasselblad-Bron blog). The flash durations for the pack in the "normal" color-stable mode are impressive, but the pack also features a "speed" mode for shorter flash durations, increasing its motion-stopping capabilities.

In "speed" mode, the Broncolor Move 1200L is limited to 1/2 power (600J) at the top end, and cuts the flash pulse shorter, enabling shorter flash durations. It also shortens the refresh time for sequential shots. This comes at the cost of color stability, as the pack cuts the power short.

With regard to flash duration, marginal improvement is seen in the Move's "speed" mode. From 1/4 through 1/128th power, there is slight improvement, with the margin narrowing, as you get lower in the power range. Interestingly, the figures measured come quite close to the quoted t0.1 times displayed on the pack itself, so you can be confident that you're getting an accurate representation of what's displayed on the Move 1200L pack.

The Move 1200L is extremely good in both modes, and while there is only marginal improvement in the "speed" mode as far as flash duration is concerned, things like shorter refresh time may be a reason to use the pack in this mode.