These ring lights consist of 56 LED"s light sources of which the light intensity is adjustable between 10-100%. Color temperature max 4300° K. Suitable for working distances between 55 and 120 mm. For 110-230 Volts operation Can be used without mounting adapter for Euromex stereo microscopes ZE.1624, ZE.1654, ZE.1626, ZE.1629 and ZE.1657