The influence of measurement setup on the waveform distortion between 2-150 kHz (Supraharmonics) is analysed in this paper using a laboratory setup. Different LED lamps are used to observe how emissions at supraharmonic range are affected when considering different power sources, network impedances and current sensors. A particular condition of network impedance modified the amplitude of emissions, whilst a particular condition of current sensor included additional emissions between 2-150 kHz. The identification of conditions where supraharmonic emissions are affected by measurement setup is a step forward to the development of reliable, standard procedures for assessing conducted power quality disturbances between 2-150 kHz.