LIT DUO 1 Digital Light Meter

LIT DUO 1 is designed to replace slower, more fragmented metering workflows with one compact and easy-to-use device. It brings together the core tools modern creators need for exposure, flash, color, illuminance, spectrum, and flicker analysis, while keeping operation fast, practical, and easy to learn.

Built for real-world production use, LIT DUO 1 combines tactile controls, a compact form factor, durable construction, modern connectivity, and an actively evolving software.

It is made for users who want professional capability without complicated operation.

• Accurate & Consistent Colors
• Measures Visible Light
• Intuitive UI, High-Contrast Display
• Works with Any Type/Brand Light Source
• Bluetooth Connectivity

Ambient and Flash exposure:
• Sensor type: Fast-response silicon photodiode, CIE spectral luminous efficiency
• Sensitivity: Visible light, human eye response
• Range Ambi / Flash: -5 EV to 22 EV at ISO 100 / f/0.5 to f/120
• Accuracy: ±0.1 EV
• Angular response: Cardioid-type response with dome diffuser

Spectrum and Color temperature:
• Sensor type: Multi spectral sensor
• Sensitivity: 12 optical channels distributed over visible light range, including XYZ and one in NIR
• Measuring range: 1600 K to 25000 K
• Accuracy and repeatability: ±3% of Kelvin value, ±50 K (to be improved with LIT OS 0.9)
• Angular response: Cosine-type response with flat diffuser

Illuminance:
• Sensor type: Multi spectral sensor
• Sensitivity: 12 optical channels distributed over visible light range, including XYZ and one in NIR
• Measuring range: 0.15 lux to 250,000 lux
• Accuracy: ±3%
• Angular response: Cosine-type response with flat diffuser

Flickering:
• Sensor type: Fast-response silicon photodiode
• Sensitivity: 250 to 1,000,000 lux
• Measuring range: 0.1 to 250,000 Hz
• Physical
• Unit dimensions: 131 × 30 × 51 mm / 5.2 × 1.2 × 2.0 in
• Body thickness: 20 mm / 0.8 in
• Bare unit weight: 150 g / 5.3 oz

Power:
• Power source: 3 × AAA batteries, replaceable
• Battery compatibility: Alkaline, Lithium, or NiMH
• USB power: Supported via USB-C, 5.0 VDC
• Battery charging: NiMH AAA charging supported in-device via USB-C
• Battery life: 40+ hours of mixed use

Wireless:
• Bluetooth range: 40-60 meters / 130-200 feet (depending on device orientation)
• Operating conditions
• Operating temperature: 0°C to +30°C / +32°F to +86°F

In the box:
• LIT DUO 1
• Protective case
• Neck strap
• Quick Start and Safety Guide
• Box dimensions: 205 × 205 × 54 mm / 8.1 × 8.1 × 2.1 in
• Box weight: 340 g