vincentb.fr

Site positioning and core features

This is a personal technical blog run by Vincent B., a practitioner at a Swiss ISO 17025-accredited photometry laboratory. Its core content centers on the EULUMDAT (.ldt) file format in the field of photometric measurement, where the author shares professional technical experience and has released a series of open-source Python toolkits. These tools cover the full workflow of EULUMDAT file reading/writing, data correction, parameter calculation, visualization, and report generation, solving common industry pain points including missing format documentation and difficulties with custom data processing.

Pricing and core features

All blog content and open-source tools are completely free, with no paywalls for core features. The tools can be installed and used directly via PyPI, the Python package management platform. The calculation logic of all tools strictly follows international CIE standards, and calculation results have been verified by mainstream industry software such as DIALux and Relux, with accuracy backed by a professional laboratory.

Pros and cons analysis

Pros

• The site's tools are completely open-source and free, and are far more professional than general-purpose open-source projects. As the developer is a frontline industry practitioner, they can accurately solve the pain points encountered in actual laboratory work.
• It fills the gap of official English documentation for the EULUMDAT format, which is extremely valuable for industry researchers.

Cons

• The use case is extremely niche and vertical, targeted only at the lighting photometry field.
• All tools are Python code packages with no graphical user interface, which is unfriendly to non-developer users, and there is no Chinese language support.

Access and compatibility

The site is currently directly accessible in China, no VPN/proxy is required. It is suitable for photometry laboratory engineers, lighting product R&D staff, and lighting simulation tool developers; general users will almost never have a use case for it.