The U.S. Air Force intends to award a sole-source, firm-fixed-price contract to Labsphere, Inc. for a Quantum Tunable Spectral Irradiance/Radiance Calibration Source, with performance at Edwards AFB, California. The system must provide a uniform light source with a 16-inch aperture, full spectral tunability from 0.25µm to 2.5µm, and luminance ranging from moonless night to maximum daylight conditions. Customization includes integration of a sphere measurement system, a customized spectrometer, and on-site training. Interested vendors must submit a complete technical package with clear evidence of capability, along with FAR 52.204-19 certifications and commercial contract details. No budget amount or submission timeline is specified in this pre-solicitation notice.