I have a wall light in my lounge that consumes 17 watts. It is situated over the PC and suffices to see the keyboard and/or anything I write down. It is also good enough for the TV. If I have visitors the main lights go on which are 6 x 40 watt tungsten filament candle bulbs. I have a dimmer switch for them and have them set at about half power. A dimmer switch acts as a choke when turning the lights on which helps them to last longer. People say that tungsten lights are less efficient because part of the power they consume goes into heat instead of light. Very true, but if you are heating your house anyway then that heat isn't wasted as it offsets your heating system's output. Unfortunately, politicians who rule on these things are not very good at joined up thinking.
I think it depends on the area of the room.
I have one in the bathroom and that is fine. The other rooms never warm up enough to see well but I just make do with a real bulb in the living room only and go there to read or sew. This is because I am mean and my electric bills are 87 pounds a month at the moment. So Furby is on an economy drive this year.
I suppose Oxford has smallish rooms if they all get their own room. Does OC live in a little modern house, his house looked modern ish on the sattelite but it may not be.
Merry why don't you try one in every room for a week each to see how it shines.
Eccles is very evil using 6 * 40 = 240 watts just to impress vistors. Why not ask them to bring their own candle.
I run those 6 x 40w at half power so it's only 120w. 
Currently (pun not intended) my combined gas + electricity is £39 a month.
Waitrose were handing them out free when I shopped on Friday so I figure they are not as good as "real" ones! However when I tried said bulb I am well impressed, Jay must have old type cos now they flicker then light up at their full strength! Goodness knows if I will notice a saving on the bill tho! 
Eccles, I want some tips! Ours is more than double that, and we are very mean with both lights and radiators. (I mean really mean - this is Mr Merry we are talking about here, the man who keeps his mobile off at all times to save the battery.
Either those low energy light bulbs save more than I thought, or we should go back to manual toothbrushes!
Well clearly I need a trip to Waitrose then! 
@Merry, my house is most likely less than half the size of yours, but the obvious money savers are:
I haven't had a bath in 18 years but I am quite clean - I shower electric.
I have thermostats on all the radiators with the lounge the only one set to 21C. The bathroom, kitchen and bedrooms are set to 16C. My bathroom is very small and it warms up quickly. I turn the thermostat up to 21C before taking a shower, and with the heat from the water warming up the bathroom, it's warm enough by the time I get out.
When I go out, I turn the room-stat right down. This turns off the whole c/h system unless the temperature gets really low.
I only use lights when I need them. Most of the time, the low energy light in the lounge is sufficient for PC or TV.
Talking of PCs, I have two. One was originally built as a spare but it's sufficient for simple tasks such as internet stuff. It consumes less power than the main PC so I use it for the simple stuff and only use the big PC for graphics stuff where the power is needed.
I have an A class fridge freezer.
I wear a sweater in the house.
My walls are part insulated. It's brick and breeze construction and the breeze blocks are hollow. Apparently, the hollow centres are filled with insulation beads. It'd be better if the cavity was filled as well and I'm thinking of doing that.
When I moved in there was only 2" of loose rockwool in the loft, so I got several bags and doubled the depth, but 4" is thought of as a minimum these days so I should add more.
I don't plan to do anything about the 6 candle bulbs as they look nice, and I don't use them for long enough to make them a power drain.
Good advice there from eccles, I agree with the never having baths and wearing more clothes tips.
Does Save-the-Planet daughter have any tips for you Merry, if you save fuel you would also be saving the planet a bit.
I have noted all my bills for last year and will be doing comparsions this year. My bills should be less this year because of getting the UPVC windows in the bedrooms.
My electric bills are 87.00 and the gas bills are 46.00 , so that is 133.00 a month.
I bath when I fancy a good long soak and a read, but Mr M likes to bang that drum about a shower using less water - it must depend how long you shower for, when I shower and leave the plug in (for feet-soaking) the bath fills up just as much as it would a proper bath!
On a normal day we only have two radiators in the house turned on (one in the bedroom/pc room where I spend most of the time when I'm indoors), one in Mr M's study. Hardly ever put the radiators on in the rest of the house except when we are actually using the particular room, and hardly ever in the kitchen (which is very large) because it heats up from cooking. However, the heating water circulates in the pipes even through the rooms where the radiators are turned off, so that warms the place up to a certain extent.
So I'm still not quite sure of the difference between Eccles' bills and ours. When both girls are home that means 4 pcs on, lots more hot water and more radiators, it must be their fault!
Furby, STPD lives in one tiny room below ground like a mole, so I imagine she is like spartan Pani and never puts any heating on at all 
She has no bathroom of her own so probably she pays a fixed shared charge for hot water, or feeds a meter?
It is Pancake Day On Tueesday.
So stock up on the pancake mix and jof lemons and warn the board to be ready.
Next Page...