Ulanzi LM21 Magnetic Fill Light

Ulanzi LM21 Magnetic Fill Light for portable phone lighting

The Ulanzi LM21 Magnetic Fill Light is a compact lighting accessory for creators who need a small, adjustable light for phone photos, video calls or simple content shooting. It uses a magnetic mounting setup and is built for easy carry in a pocket or kit bag.

Three Color Temperature Modes

The LM21 switches between 2500K, 5600K and 8000K, so you can match warmer or cooler light to the scene. That makes it easier to keep skin tone and background lighting looking consistent without carrying a larger panel.

Brightness and Runtime Balance

Brightness adjusts from 10% to 100%, giving you control over how strong the light appears. Ulanzi lists battery life at about 1.2 hours at maximum brightness and about 10 hours at minimum brightness, so runtime depends on how bright you run it.

Compact Build with Type-C Charging

The light measures 71 x 60 x 20 mm and uses a Type-C charging port. It also supports 5V/1A charging from a power adapter or power bank, which is useful when you want to top it up from common everyday chargers.

What Comes in the Box

The manual lists the LM21 light, a magnetic adapter ring, a Type-C to Type-C charging cable and a user manual. If you want the magnetic mounting feature, the included adapter ring is part of the package.

Is it right for your setup?

This model suits buyers who want a simple magnetic fill light rather than a larger studio lamp. It is a better fit for quick mobile shooting, but it is not a substitute for a more powerful video light when you need stronger illumination over a wider area.