Sources for the PerkinElmer LC-240 fluorescence detector and luminescence spectrometers are pulsed xenon discharge lamps (7.3 W average power at 50 Hz).

This reliable source produces very little ozone or heat but provides remarkable sensitivity due to its peak intensity exceeding 1 kW. On most LS Series instruments the detector electronics are controlled so that delay and gate time can be varied to measure phosphorescence between source pulses.