And it doesn't matter how big a stash of light bulbs you have, or how many different fittings, voltage or wattage is in your stash...... you won't have the bulb that you need right now. So you take the blown bulb out of the lamp, put it in your bag so that you can get the exact bulb that you need when next in town. But the store will have aisles and aisles of light bulbs, of every size, fitting, colour, wattage, dimmable/undimmable, clear, opaque, daylight, warm light....... BUT THEY WON'T HAVE THE BULB IN STOCK THAT YOU NEED NOW. Because it needs to be ordered. 