# BR40 light bulb (E26 base)

> What size is an BR40 light bulb?

- Category: Everyday objects › Light bulbs
- Kind: Modern device
- Basis: Philips product datasheet (Philips 8.8BR40/PER/927-22/P/E26/WG)
- Page: https://xemstudio.com/objects/br40-light-bulb/ · JSON: https://xemstudio.com/api/geometry?object=br40-light-bulb · Plain text: https://xemstudio.com/objects/br40-light-bulb/sheet.txt
- License: dimension sheet CC BY 4.0 (Xem Studio); linked files under their publishers' licenses
- Use in every chat: add https://xemstudio.com/mcp as a connector (https://xemstudio.com/use-with-ai/)

## Overall (mm)

| length | width | height |
|---|---|---|
| 125.4 | 125.4 | 160.3 |

**Exact dimensions.** True size, with no printing tolerance added.

## Notes

- BR40: Ø125.4 mm, 160.3 mm maximum overall length, E26 base — figures from the Philips 8.8BR40/PER/927-22/P/E26/WG datasheet.
- The shape code gives the diameter in eighths of an inch (BR40); the ANSI C78 envelope limits are paywalled, so a typical current product is quoted. Other brands differ by a few mm in length.
- The file is a cylinder envelope Ø × MOL (the bulb fits inside it).

## Sizes

| dimension | value |
|---|---|
| diameter | 125.4 mm (4.94 in) |
| max overall length | 160.3 mm (6.31 in) |
| base | E26 |
| reference product | Philips 8.8BR40/PER/927-22/P/E26/WG |

## Where the files are

- Philips: [Philips 8.8BR40/PER/927-22/P/E26/WG datasheet](https://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp929002009104-pss-en_us) — web — Publisher's page; dimensions are facts

## Free STEP/STL (1 parts, CC BY 4.0, Xem Studio)

Index: https://xemstudio.com/files/hardware/br40-light-bulb/index.json

- br40-light-bulb-envelope: [STEP](https://xemstudio.com/files/hardware/br40-light-bulb/br40-light-bulb-envelope.step) · [STL](https://xemstudio.com/files/hardware/br40-light-bulb/br40-light-bulb-envelope.stl) — Envelope Ø125.4 × 160.3 mm

## Questions

**How big is an BR40 bulb?**

About Ø125.4 × 160.3 mm (reference product).

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