Read the tool instructions in Markdown and the request/response schemas in OpenAPI. These public calculation APIs run the same models as the web and offline calculators. No account, API key or Turnstile is required.

• IES / LDT Photometric Viewer — Full tool instructions (Markdown)
• OpenAPI contract
• Agent site index

IES / LDT Photometric Viewer

POST /api/tools/v1/photometry
Content-Type: application/json

Read Type C IES with TILT=NONE or single-lamp-set EULUMDAT text. Return file facts, integrated flux and full-width beam metrics, plus every requested intensity query in candela. This does not verify laboratory measurements or replace a lighting design study.

Photometry JSON bodies are limited to 1024 KiB, independently of the browser file limit. The parsed table is limited to 250000 cells per file; HTTP results include only the explicitly queried directions and full-file metrics, not a silent partial export of the native table.

photometry

IES / LDT photometric analysis

POST files as JSON-escaped text with explicit cPlanesDeg and gammaAnglesDeg arrays. Angles must be strictly increasing: C is in [0,360), gamma in [0,180]. Maximum 4 files, 16 C planes and 721 gamma angles per file. The sample is mathematical test data, not a LEDYI product.

{
  "files": [
    {
      "name": "synthetic-constant.ies",
      "text": "IESNA:LM-63-2002\n[MANUFAC] Synthetic example, not product data\nTILT=NONE\n1 -1 1 3 1 1 2 0.1 0.1 0\n1 1 10\n0 90 180\n0\n100 100 100"
    }
  ],
  "cPlanesDeg": [
    0,
    90,
    180,
    270
  ],
  "gammaAnglesDeg": [
    0,
    30,
    60,
    90,
    180
  ]
}

The browser reads files locally; this API explicitly sends the supplied text to the server for stateless analysis. No external file URLs are fetched. Source text is excluded from response inputs and logs; no result is stored. links.share is null because source files are not encoded in URLs. Use Save offline copy for a local, restorable handoff. Compare tested source length, power setting, CCT and optics before drawing product conclusions. Values are not automatically per metre.

Request limits and errors

Send uncompressed application/json with strict types and no query parameters. Indoor lighting bodies are limited to 16 KiB; driver-match bodies to 16 KiB; battery bodies to 16 KiB; voltage bodies to 16 KiB; resistor bodies to 16 KiB; DMX bodies to 1024 KiB and 1000 fixtures; pixel bodies to 64 KiB, 64 run rows, 128 outputs and 2000000 channels. DALI bodies are limited to 64 KiB, 24 rows and 512 devices. Illuminance bodies are limited to 16 KiB and 400 planned points. Photometry bodies are limited to 1024 KiB with up to 4 files and 16 by 721 query directions per file. Lighting-cost bodies are limited to 64 KiB with up to 20 groups in each scenario. Body reading expires after 5 seconds. Complete success JSON is bounded to 4 MiB. GET/HEAD return 405; OPTIONS returns 204. Source responses are no-store. Anonymous browser CORS permits POST/OPTIONS and Content-Type with credentials omitted.

Tool POST requests and ordinary page requests share 120 requests per 60 seconds per IP/Cloudflare location; mitigation lasts 60 seconds. Heavy tool use can temporarily block pages from the same source. This is not an independent or globally exact API quota. Inquiry/search use their existing separate rule. Tool POST requests do not inherit the company-page or verified-bot exemption.

Cloudflare can return 403/429/5xx before the application, sometimes as HTML without CORS or Retry-After. Check HTTP status and Content-Type before parsing JSON. A browser may see only a network error. Do not present an error or an older result as a successful new calculation.