Lighting at Old Street

Wood Green seems to have similar lighting now as Old Street does, strange sight when passing through on a train.

@ norbitonflyer

Isn't that like having heavy, energy grabbing, energy inefficient airconditioning units on trains that are needed because the windows don't open?? How much lighter would the trains be, and how much power could be saved just by having windows that could be opened??

Castlebar's point is (if I may be so bold) that,were a train to have opening windows,it ould not need A/C in the first place.
This would save money in manufacture,running costs both of the A/C itself and in terms of the power needed to propel the extra weight of the (heavier) airconditioned trains.These may,consequently necessitate upgrading the power supply (pace S Stock on the Metropolitan Line)
Our climate is such that A/C is only conceivably needed for a few weeks a year,yet the costs of running an A/C'd train will always be greater than one whose window simply open in order to let in fresh air.
It seems absurd in an era of perpetually increasing energy costs,to still be designing new stock which has greater energy consumption than that which it replaces.

Slugabed is correct. As a consequence, even more energy is consumed having to "cool" the stations because of the heat chucked out by the a/c units etc., something that was never needed until recently.

It is madness and an ecological disgrace. We cannot waste global resources like this because somebody has made a decision to buy expensive air cond units rather than windows that open.

I am reminded of the famous "Cadbury's 'Smash' advert that has some aliens looking at us on T.V. stating "Truly, they are a very backward people"

Trains with opening windows can still be stiflingly hot in summer.

Hmmm, I don't seem to have that problem on the Talyllyn Railway: Drop-lights that allow plenty of air in and a nice fresh breeze with a slight hint of cylinder oil. Mind you, the most complex electrical installation is four wires, four lamps and twelve volts! The water tends to be more problematic; there was sufficient water pooling in the glass lamp-surround that I was tempted to drop a plastic fish into it!

Now mrfs42 has stopped making the sandwiches, yes occassionally!

I can find no mention of colour temperature in the design guidelines for TfL/LU published on the internet, however this is mostly concerned with graphic design and maintenence of listed buildings, etc, of which Old Street is not an example.
It might be worth an FOI request if nobody can find anything else.

Actually 'blue' light is what's used now to treat SAD, cant remember the science reason but it's better for improving moods.