Capacitor for Hanovia medium-pressure ultraviolet disinfection systems, 2.4 kV, 1 µF, ±5% tolerance, part 660077-0106. Capacitors of this rating sit in the lamp control gear, where they set the circuit conditions a medium-pressure lamp needs to strike and then run stably. A capacitor that has lost value shows as a lamp that fails to strike, strikes and drops out, or runs below rated output. Hanovia lists this rating in three values under one part-number family — the two digits before the final 06 give the capacitance in µF, so 660077-0106 is 1 µF, -0206 is 2 µF and -0406 is 4 µF. Check the value on the can before ordering. Reference number 22121-0216.