Saturday 15 May 2010: day zero
I'd only previously encountered one of these, on the ceiling of the bathroom in an hotel a couple of years ago. Unlike this, that one didn't appear to have an option to switch off the heating element and just retain the bulb-option, albeit a bulb which chucks out a fair bit of heat anyway. After a bit of fiddling we managed to get the element to stay off and the light to come on when the secondary pull-switch is used, though such a strange and potentially dangerous device is unlikely to be very low down the list of things to be amended. The house' former owner appeared to know about energy-saving bulbs as the hall and landing lights are of those types but had evidently not cared sufficiently to replace more of her bulbs. Those remaining shall be harvested and perhaps used in some sort of occasional photographic-lighting capacity insofar as such a thing might be needed now that we have windows unimpeded by nearby high buildings.