"Andy Champ" wrote in message
. uk...
On 13/03/2013 02:28, Arfa Daily wrote:
snipThey then went on to
make some further claims about how much more money they were going to
save as a result of fitting these new LED based lights. Both myself, and
my neighbour, who is an industrial electrician of many years experience,
think that the claims being made are fairly outrageous, and that the
numbers, as presented, don't stack up.
/snip

snip to fill in the pools of gloom left by setting fewer
of them further apart./snip

It'll be the lower number of lights and the night-time dimming that save
money, not the efficiency.

Andy


My thoughts exactly, and figures actually based on when all of the LPS
lights were on, rather than the savings that had already been achieved by
switching lights off. The way it has been presented makes it look like there
is going to be a ****load more savings as a result of changing to LED
lights, but I feel that there may only be an additional small saving from
having still fewer lights with the new spacing, and dimming them at whatever
time that they are doing that. I'm sure that similar savings could have been
made much more cheaply, by retro-fitting a time clock or whatever, to work
in conjunction with the twilight sensor, to similarly turn off the LPS
lamps. The fact that all of the existing lamposts are being ripped out and
replaced, must represent a staggering additional cost to the council. It
seems to me that this is largely another eco-bollox initiative that has
little justification, other than to make lots of money for the
manufacturers, and the contractors (a major UK civil engineering company)
who are putting them in. I wonder what sort of scrap value is being given
for the removed lights, and who's getting that ...?

Arfa