Ceiling surface-mounted plug-in photocell switches


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This 'Re-set' version switches the lights off when there is sufficient ambient light but requires the wall switch to be operated in order to switch on. In this way the lights only switch on when they are demanded.

For surface mounting onto solid ceiling.

  • Built-in differential ensures the artificial lights do not affect the photocell.
  • Built-in time delay of 1 minute avoids unnecessary switching.

Product code: CEPH RE

Requires socket, order code: CESO SQ or CESO

Ceiling surface mounted versions: CESF NO and CESF PHRE are also available
on request.


ceph-no-main-1Manual wall switch
retained for overriding OFF
and for re-setting CEPH RE 





For saving lighting energy in offices, factories, sports halls and so on.


CEPH RE Plugs into CESO SQ Ceiling socket (or CESO Ceiling socket). CESO SQ can be mounted on a square pattress box (or CESO can be mounted on a BESA box).
Photocell range: Switches on at between 100 and 1000 lux falling on the working plane
Loading: Up to 6 amps (1500W) of resistive loads.
Up to 6 amps (1500W) of fluorescent loads.
Up to 3 amps (750W) of electronic and wire wound transformer loads.
Up to 2 amps (500W) of CFL, 2D lamps, LED Drivers and LED lamps and fittings.
Up to 1 amp (250W) of fans.
Dimensions: 88 x 88 x 47mm