altStellarnet (Tampa, FL) introduces the BLACK-Comet-HR concave grating spectrometer. Designed for high-resolution applications, the new BLACK-Comet-HR spectrometer is available for measurements in two ranges — ultraviolet (200- 600 nm) and visible (380-750 nm), and achieves resolving resolutions of 0.4 nm. The spectrometer can be configured for LED measurement. For a complete LED measurement system, in addition to a StellarNet Spectrometer, a fiber optic cable and an integration sphere are needed for accurate and precise measurement.