In days gone by, it was quite simple to have a few spare light globes in the cupboard. They were all bayonet-cap; the only choice was the wattage – somewhere between 25 w to 100 w, occasionally even a little brighter.
But these days, some fittings are screw-in (“ES”), and around the house we have a few varieties, ranging from “candle” globes through to various spot lights. And technology has changed: the simple old cheap and plain filament globes have been banned on energy efficiency grounds, and we now have to choose between mini fluors, halogen, LEDs …. and more.
Hence, although I’ve got a shelf full of legacy type globes, usually I just buy a replacement when I need it. That can be a challenge, too. Sure, at Bunnings, they’re all neatly arranged, but at our local supermarket, the shelves are invariably a confusing mish-mash, and it’s pure luck if the description on the shelf accords with the type of globe that’s actually stacked there!
Musings and Mutterings 
We always have at least a replacement for each one available, especially our lamps and kitchen down lights.
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