nine energy saving light bulbs - free!

[malumbu]

The old CFIL ones, that were common before LEDs a few years ago, last forever and if you have, say some communal area, garage and the like with occasional use will be fine. Standard bayonet fitting - some may recall when these were really expensive!

For longer term needs invest in LEDs

I'll put down more details later, but dipping a toe before I leave on the street, and ultimately take to a recycling centre.