The best plastic lamp post globe is the one that matches your fixture’s globe diameter and opening style. For a standard 3.91-inch fitter neck, KASTLITE’s 8-, 10-, and 12-inch globes offer three size choices in UV-resistant white acrylic. The 12-inch neckless globe from Post Globes etc. and KASTLITE’s 14-inch neckless option suit fixtures designed for a wider, 5.25-inch opening. Measure your existing fixture before choosing: a globe that looks close in size may not attach correctly.
| Product | Globe Size | Opening | Best For |
|---|---|---|---|
| KASTLITE 8-inch globe | 8 inches | 3.91-inch fitter neck | Smaller fixtures |
| KASTLITE 10-inch globe | 10 inches | 3.91-inch fitter neck | Mid-size fixtures |
| KASTLITE 12-inch globe | 12 inches | 3.91-inch fitter neck | Larger standard-neck fixtures |
| Post Globes etc. 12-inch globe | 12 inches | 5.25-inch neckless opening | Neckless fixtures |
| KASTLITE 14-inch globe | 14 inches | 5.25-inch neckless opening | Large neckless fixtures |
KASTLITE 12-Inch Acrylic Globe
Best for: Replacing a 12-inch globe on a fixture with a 3.91-inch outside-diameter fitter neck. This white acrylic cover has a smooth finish and is made with one-piece injection blow molding.
The listed features specify UV-resistant acrylic, a continuous operating temperature up to 90°C, and 92% transmittance. Those details may help buyers compare material and light transmission when replacing an existing cover. The product is identified as a lamp post globe, not a ceiling-fan replacement.
Limitation: It is not a fit for every 12-inch fixture. The 3.91-inch neck must match, and the seller advises measuring carefully; the listing notes a restock fee for returns caused by incorrect measurement.
KASTLITE 8-Inch Acrylic Globe
Best for: A smaller lamp post fixture that requires an 8-inch globe and a 3.91-inch fitter neck. It shares the smooth-textured white acrylic construction and one-piece molded design listed for the other KASTLITE fitter-neck sizes.
The manufacturer describes the acrylic as UV resistant and lists a continuous operating temperature up to 90°C and transmittance of 92%. This is a lamp post cover, and the product information says it is not intended for ceiling-fan replacements. Choose this size when the existing globe diameter—not just the opening—measures about 8 inches.
Limitation: A matching neck alone does not confirm fit. Check both the globe diameter and the fixture’s neck measurement before ordering.
KASTLITE 10-Inch Acrylic Globe
Best for: Buyers who need a middle-size option with the common 3.91-inch fitter neck. At 10 inches, it falls between the listed 8- and 12-inch KASTLITE globes, making it a useful size-specific replacement choice.
Its listed features include white acrylic, a smooth texture, UV resistance, one-piece injection blow molding, and 92% transmittance. The stated continuous operating temperature is up to 90°C. Like the other fitter-neck models, it is specified for lamp posts rather than ceiling fans.
Limitation: The listing cautions buyers to measure before ordering and notes a restock fee for returns related to incorrect sizing. Do not select it solely because the current globe appears close to 10 inches.
Post Globes etc. 12-Inch Neckless Globe
Best for: Replacing a 12-inch globe on a fixture that uses a 5.25-inch neckless opening rather than a raised fitter neck. The supplied details identify it as white acrylic, made in America, and equipped with UV inhibitors.
This option is distinct from the KASTLITE 12-inch model: the globe diameter is the same, but the opening style and measurement differ. Choose it only if your fixture is designed for the 5.25-inch neckless opening. The UV-inhibitor feature is specifically listed, but other performance details are not provided in the product information supplied here.
Limitation: The listing details provide fewer specifications than the KASTLITE options, so verify the opening and any fixture-specific mounting requirements before purchase.
KASTLITE 14-Inch Neckless Globe
Best for: A larger lamp post fixture that needs a 14-inch globe and a 5.25-inch outside-diameter neckless opening. Its listed construction is white, smooth-textured acrylic, formed as one piece through injection blow molding.
The product information specifies UV-resistant acrylic, 92% transmittance, and a continuous operating temperature up to 90°C. It is identified as a lamp post globe, not a ceiling-fan replacement. Choose this model over the 12-inch neckless option when the fixture calls for the larger globe diameter.
Limitation: This globe will not match a 3.91-inch fitter-neck fixture. The listing recommends measuring carefully and notes a restock fee for returns caused by ordering the wrong size.
Buying Guide: How to Choose a Plastic Lamp Post Globe
Which measurements matter most?
Measure the globe diameter and the fixture opening separately. For a fitter-neck design, check the outside diameter of the neck that enters or sits on the fixture. For a neckless globe, confirm the opening diameter and how the existing globe is retained. Compare those measurements with the product specifications rather than relying on appearance.
Should you choose a fitter neck or neckless opening?
Match the replacement opening style to the lamp head. The KASTLITE 8-, 10-, and 12-inch options listed here have 3.91-inch fitter necks. The Post Globes etc. 12-inch and KASTLITE 14-inch options use neckless openings specified at 5.25 inches. These opening types are not interchangeable based on globe diameter alone.
What size globe should you buy?
Use the existing globe or fixture measurements to choose among 8, 10, 12, and 14 inches. A larger globe is not automatically a better replacement: it must suit the lamp head’s proportions and fit the mounting opening. If the old cover is broken, measure the fixture and consult its documentation when available.
Is acrylic the right material?
All five options are described as acrylic. The KASTLITE listings specifically state UV resistance, 92% transmittance, and a continuous operating temperature up to 90°C. The Post Globes etc. listing identifies UV inhibitors but does not provide the same set of performance specifications. Compare only the features stated for each product.
Frequently Asked Questions
Are these globes suitable for ceiling fans?
The KASTLITE product details state that their lamp post globes are not for ceiling-fan replacements. Check the intended use of any replacement cover before ordering.
Can a 12-inch globe fit any 12-inch lamp post?
No. Globe diameter does not determine opening compatibility. A 12-inch globe may have a 3.91-inch fitter neck or a 5.25-inch neckless opening, so match the fixture measurements.
What does fitter neck mean?
A fitter neck is the shaped opening at the base of a globe that connects with a compatible fixture. Measure its outside diameter and compare it with the listed fitter-neck size.
How do I avoid ordering the wrong size?
Measure the globe diameter and fixture opening before buying. Confirm whether the fixture requires a fitter neck or neckless opening, and compare both measurements with the product listing.