The Sekonic C-4000 Spectrometer is a groundbreaking tool that revolutionizes lighting measurement and design. This professional-grade device measures color temperature across an impressive range of 1,600K to 40,000K, making it indispensable for lighting designers and technicians. The sleek, handheld unit features a color touch screen display that shows crucial measurements including lux, color temperature, and light quality information. What sets the C-4000 apart is its seamless integration with modern technology - it connects via Bluetooth to both iOS and Android devices through the Sekonic LD app, enabling remote measurements and advanced data analysis. The device offers both continuous and single measurement modes, while USB-C connectivity ensures quick data transfer and charging. The companion app provides comprehensive features including CIE1931 chromaticity diagrams, spectrum analysis, and CRI measurements. For professionals seeking detailed light analysis capabilities, the paid version of the app unlocks additional features like GPS location tracking, detailed reporting, and plot measurements. This compact yet powerful spectrometer combines precision engineering with user-friendly operation, making it an essential tool for anyone serious about lighting design and measurement.