Gamma Scientific has released LED test sockets for use with spectroradiometer and photometer systems. The sockets hold LEDs in place to enable precision measurements of spectral characteristics such as luminous flux, radiant intensity and dominant wavelength. They accept standard, miniature and subminiature LEDs. The sockets feature a locking flange that snaps into a CIE Condition A or B baffle tube. An ultraprecision model also includes spring-loaded finger clamps to ensure that the distance from the tip of the LED under test to the detector conforms to CIE publication 127. The sockets are compatible with power supplies from a variety of manufacturers.