Conventional lighting control circuit

In the picture
. Ei, E2, E3 and R are four groups of fluorescent lamps respectively, S1~S4 are the local control switches
of the four groups of fluorescent lamps , SA is the control switch of all fluorescent lamps , PT is the time switch (clock), K] and Kz are the interval times. Delay pulse relay (can be reset by photosensitive switch), K3~ K6 are remote control switches that can be disconnected centrally .