{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "br40-light-bulb",
 "name": "BR40 light bulb (E26 base)",
 "kind": "modern",
 "category": "Everyday objects",
 "group": "Light bulbs",
 "year": null,
 "question": "What size is an BR40 light bulb?",
 "tags": [
  "light bulb",
  "lamp",
  "br40"
 ],
 "aliases": [
  "br40 bulb size",
  "br40 dimensions",
  "br40 light bulb dimensions"
 ],
 "overall_mm": {
  "length": 125.4,
  "width": 125.4,
  "height": 160.3
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 1,
 "url": "https://xemstudio.com/objects/br40-light-bulb/",
 "sheet_txt": "https://xemstudio.com/objects/br40-light-bulb/sheet.txt",
 "sheet": {
  "basis": "Philips product datasheet (Philips 8.8BR40/PER/927-22/P/E26/WG)",
  "overall_mm": {
   "length": 125.4,
   "width": 125.4,
   "height": 160.3
  },
  "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)."
  ],
  "table": {
   "columns": [
    "dimension",
    "value"
   ],
   "rows": [
    [
     "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"
    ]
   ]
  }
 },
 "sheet_text": "BR40 light bulb (E26 base) — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/br40-light-bulb/  (CC BY 4.0)\nBasis: Philips product datasheet (Philips 8.8BR40/PER/927-22/P/E26/WG)\nCatalog version: 2026-10-20\n\nOverall (mm): length 125.4, width 125.4, height 160.3\n- 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.\n- 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.\n- The file is a cylinder envelope Ø × MOL (the bulb fits inside it).\n\ndimension  value\ndiameter  125.4 mm (4.94 in)\nmax overall length  160.3 mm (6.31 in)\nbase  E26\nreference product  Philips 8.8BR40/PER/927-22/P/E26/WG\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Philips: Philips 8.8BR40/PER/927-22/P/E26/WG datasheet — web — Publisher's page; dimensions are facts — https://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp929002009104-pss-en_us\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 1 parts): https://xemstudio.com/files/hardware/br40-light-bulb/index.json\nAPI: https://xemstudio.com/api/geometry?object=br40-light-bulb\n",
 "sources": [
  {
   "publisher": "Philips",
   "title": "Philips 8.8BR40/PER/927-22/P/E26/WG datasheet",
   "url": "https://www.assets.lighting.philips.com/is/content/PhilipsLighting/fp929002009104-pss-en_us",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "a19-light-bulb",
  "a21-light-bulb",
  "br30-light-bulb",
  "par30l-light-bulb",
  "par38-light-bulb",
  "g25-light-bulb",
  "mr16-light-bulb",
  "gu10-par16-light-bulb"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "How big is an BR40 bulb?",
   "a": "About Ø125.4 × 160.3 mm (reference product)."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "br40-light-bulb-envelope",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "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",
   "note": "Envelope Ø125.4 × 160.3 mm"
  }
 ],
 "markdown": "https://xemstudio.com/objects/br40-light-bulb/index.md"
}