The Ulanzi LM-P40Bi Portable Video Light 40W Bi-color is a compact 40W dual-color LED light designed for video, streaming, interviews, and mobile production. It offers an adjustable color temperature of 2700–6500 K, smooth dimming from 1% to 100%, high color rendering (CRI 96+), a built-in 37 Wh battery, and USB-C PD charging.
The Ulanzi LM-P40Bi Portable Video Light 40W Bi-color is a compact 40W dual-color LED light designed for video, streaming, interviews, and mobile production. It offers an adjustable color temperature of 2700–6500 K, smooth dimming from 1% to 100%, high color rendering (CRI 96+), a built-in 37 Wh battery, and USB-C PD charging.
A compact portable Bi-Color LED light with a built-in 37 Wh battery, 2700–6500 K colour temperature and a magnetic diffuser. It suits video, streaming and interviews.

The body measures only 158 × 86 × 34 mm. The built-in battery powers the light without a cable and USB-C PD recharges it quickly.
Soft light with the diffuser.
Runs while charging.
True colours, CRI 96+.
37 Wh battery.
The dual-colour range lets you quickly match warm interior lighting or cooler daylight. Smooth dimming gives you control over intensity.

High colour rendering helps preserve natural skin tones and product colours. The light reaches up to 14,000 lx at 0.3 m at 6500 K and 100% brightness.

The display shows the current colour temperature, brightness and battery status, so you can check the settings at a glance.

One knob sets colour temperature (CCT), the other brightness (DIM). Operate the light with one hand and without digging through menus.

At full power the light runs for about 35 minutes, at 50% brightness for about 1 hour 20 minutes. With a 65 W or higher PD charger it recharges in roughly 1 hour 40 minutes and can be used while charging.
The diffuser snaps onto the light with magnets and softens the light for portraits and talk-to-camera shots. The beam angle is 120°.

A hollow body and built-in cooling carry heat away, so the light keeps steady output during longer shoots.

Two 1/4" mounting points let you fix the light to a tripod, arm or other rigging accessories. The photo illustrates an example of use.

The light, a magnetic diffuser and a user guide.

The LM-P40Bi is designed for creators who need more powerful lighting in a portable package. Its 40 W output helps illuminate interviews, product shots, streaming setups or small stages without a large studio light. The dual-colour range of 2700–6500 K lets you quickly match warm indoor lighting and cooler daylight. Dimming from 1 to 100% gives you control over intensity, and a high CRI of 96+ helps preserve natural skin tones and product colours. The built-in 37 Wh battery enables cordless operation and USB-C PD recharges the light quickly.
| Manufacturer: | Ulanzi |
| Category: | Portable lights |
| Type of light | Bi‑colour LED panel |
| Power (W) | 40Watt |
| Power supply type | USB-C |
| Color temperature | 2700K-6500K |
| CRI | 96 |
| Illuminance | 14000lx |
| Battery capacity | 5000mAh |
| Illuminance measuring distance | 0.3m |
| Light mounting | 1/4"-20 thread |
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