On 24/04/2019 15:47, dennis@home wrote:
On 24/04/2019 10:30, tim... wrote:
Hi,

My new abode is in a block of flats that has interior lighting
provided by (60) bulkhead lamps which are mostly on 24-7 (with some
controlled by light sensors so as only on when it is dark)

I have been tasked with looking to see if we can replace some of then
with ones which detect movement so that they can be off for the large
parts of the day when no-one needs them

It seems that the style of lamps that we have now is not currently
available and I suspect there will be resistance to having different
style of lamp along the corridor so it's replace all of them or none
of them

Currently the bulls we use are 2 times 7W CFLs and the smallest LED
replacement that can be styled with "Integrated" movement sensor is
10W so replacing those lamps which will need to remain on 24-7 is
going to be negative (after the cost of installation ahs been taken
into account)

So the end result of changing all of the lamps has to result in a very
significant saving from the ones which are going to go on-off
overnight, for this to be worthwhile.

Adding external PIR sensors into the supply is going to be a mess
(especially as the corridor was only recently redecorated and there's
no way that redecorating afterwards can be justified) so is it
possible to obtain just the internal microwave sensors and have them
installed inside the lamps that we currently have - there is plenty of
space for this.

Anybody have an experience of this.

TIA

Tim






You could fit a few wireless PIR sensors and a switch to turn the lights
on.

You don't say how long the corridor is so I have no idea how many
sensors you would need.

Someone would have to swap the batteries every year or two.

At least an ordinary sparky will know how to do it.

Not with the info Tim has provided.




--
Adam