Stair Lighting Problem

[vini]

I wonder if any of you can come up with a solution to this issue.

I have stair lighting which is controlled by 2x two way switches and 5x intermediate switches. Each switch turns on and off the entire lighting in the stair. My customer wants to be able to limit the time the lights are left on as some individuals switch on the lights, go into their flat and forget to switch off.

Other than swap the 7 light switches for 7 timer switches at £20 a pop plus installing, do any of you know of a component which I could retro fit to do the timer job.

I had looked at this but not sure if it would work, waiting on Schneider getting back to me.
Staircase Timer Light Switch, 230 V, 1 → 7 min@ 50 Hz, 48 s → 5.6 min @ 60 Hz Setting Time
15363 | Staircase Timer Light Switch, 230 V, 1 → 7 min@ 50 Hz, 48 s → 5.6 min @ 60 Hz Setting Time | Schneider Electric - http://uk.rs-online.com/web/p/products/8968569/?grossPrice=Y&cm_mmc=UK-PLA-_-google-_-PLA_UK_EN_Automation_And_Control_Gear-_-Timers_And_Counters&mkwid=sobRHR8Wl_dc|pcrid|88056617643|pkw||pmt||prd|8968569&gclid=CjwKEAjwgtTJBRDRmd6ZtLrGyxwSJAA7Fy-hUnjh_rnl0YMdxBO9goJ8sHRZkYWY4AzfyqoGhZIV6RoCC7rw_wcB

 

[marc8]

You only need one timer, but will need to change the switches to a re tractable switch type. Alter wiring to type of switch being fitted

 

[Rpa07]

Is that the 'bell push' type of switch @marc8?

 

[The Ghost]

Put no neutral sensor switches in.

 

[marc8]

Is that the 'bell push' type of switch @marc8?

Yes that type make when pushed then breaks when you let go.
Or below go for no N switch & forget timer

 

[Octopus]

Probably better to change all the lamps for LED's...

 

[Deleted member 9648]

Bypass the switches and fit microwave sensors in each light.

 

[telectrix]

take the lamps out and give each tenant a torch. that'll teach 'em to switch off.