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Any tips on how (read carefully) to extend the lip of a light globe so that the whole globe can extend further out from a light bulb base?

The proximate reason is that we want to use a CFL ("curly") light bulb in a particular fixture. As with many ceiling fixtures, the globe is secured to the base upside-down by screws that fit loosely under the lip of the globe. The bulb is about 3/4" longer than the original, so the globe is now too short and can't be attached.

Yes, of course we could just use shorter LED bulbs! Or buy a new globe! But set that aside for now, because the technique potentially has broader applications.

Logically, the approaches are either lengthen the glass globe (that is, extend a secondary lip somehow) or add length using the attachment screw. To create longer globe I've thought of a removable metal ring around the first lip, with a second ring serving as a new lip attached somehow. A glue gun might be involved, or maybe soldering (I can't weld, and I'm not yet ready to learn glass blowing).

To add length at the attachment screw, I thought of a piece of metal approx 1 cm x 3 cm with a hole drilled in one end and the other end bent/curled up to fit into the metal lip.

Does anyone have other ideas? Thanks!

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Sorry but that's a code violation (NEC 110.3 in El NEC nations), as it violates the instructions which came with the light and the conditions under which the light was listed by UL, CSA or relevant authority.

Change the globe.

Most light globes have relatively standard bases. A lighting supply shop will likely have other globes to fit that base.

If not, LED/CFL both have special cooling requirements that older fixtures are simply not designed to provide (since incandescents prefer living in an oven, it is literally their name). This can greatly shorten the "bulb" life. Most fixtures are cheap, and replacement fixtures are cheap, so you're better off getting a fixture that is well suited to the modern "bulbs" you are using.

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  • I'm not sure you've understood? The bulb screws up into the electrical socket. Then as a cosmetic touch, to reduce glare, a glass globe is suspended over it. Right now the thing's got a bulb in it and is shining away naked. I don't see how the things I am asking about would affect the base, the wiring, or the cooling (or how this could be a code violation).
    – Diogenes
    Jan 30, 2022 at 1:58

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