The Mammoth M400 is a professional-grade PAR meter and spectrometer built for growers, researchers, and lighting professionals who need accurate, full-spectrum measurements in one portable device.
Developed in collaboration with our manufacturing partners, the M400 combines a high-speed CPU with a precision CCD optical sensor and advanced spectroscopy system to deliver lab-level accuracy in a compact, field-ready instrument.
With full spectral analysis from 380–780nm and PPFD readings within 5% of leading lab-grade meters, the M400 gives you the performance of $2,000+ instruments at a fraction of the cost.
Most PAR meters over $500 only provide basic PPFD readings. The M400 delivers complete spectral data, advanced analysis tools, and professional accuracy in one device.
💻 Data Export Option: You can download spectral data using our beta software (3rd-party developing). Please Note: functionality is limited, may not work on all computers, and support is not currently available as it is 3rd party Beta right now. Click here
Key Features
Lab-Level Optical Performance
2nm spectral bandwidth for precise measurements
Full wavelength range: 380–780nm
PPFD accuracy within 5% of leading professional meters
Stable, repeatable readings across all light sources
Advanced Spectroscopy System
High-precision CCD optical sensor
Minimum integration time: 50 μs
Detects both high-intensity and low-intensity light
Adjustable integration for different environments
Portable, Durable Construction
Lightweight, all-aluminum alloy body
Compact, field-ready design
Built for daily professional use
Intuitive Touchscreen Interface
3.5" HD IPS capacitive touchscreen
Smooth, responsive operation
Clear, easy-to-read data display
Long Battery Life
Up to 24 hours of continuous testing
Quick start and one-click measurement
Measurement Capabilities
The M400 provides a full suite of lighting analysis tools:
PPFD (PAR) measurement
Full spectral distribution map
Color temperature (CCT)
Illuminance (lux)
Irradiance (W/m²)
Chromaticity coordinates (x,y)
Relative spectral power distribution
CRI (Ra, R1–R15)
Chromaticity and color tolerance maps
Peak wavelength and half-width analysis
Color ratio analysis (red, green, blue)
Data Export (Beta Software)
Per-nanometer spectral data export available
Requires third-party beta software
Functionality may vary by computer
Limited support during beta phase
Technical Specifications
Model: M400 Spectral Color Illuminometer
Wavelength Range: 380–780nm
Sensor: High-precision CCD
Spectral Bandwidth: 2nm (FWHM)
Resolution: 0.2nm
Wavelength Accuracy: ±0.5nm
Chromaticity Accuracy: ±0.0015
Illuminance Range: 0.1 lux – 2,000 Klux
CRI Accuracy: ±1.5%
Display: 3.5" IPS HD touchscreen
Color Temperature Range: 1,000K – 100,000K
Battery Life: Up to 24 hours continuous use
Built for Real-World Lighting Professionals
Whether you’re dialing in a commercial grow, testing fixtures, or performing research, the Mammoth M400 delivers accurate, full-spectrum data in a rugged, portable package.
Professional performance. Full spectral insight. Real-world value.
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