Emergency Lighting Power Converter

The emergency lighting power converter is a simple radiation hard topology for low power emergency escape lighting in radioactive environments.

Learn more:

For higher power applications, such as conventional lighting of accelerator tunnels, please see this project: https://ohwr.org/project/radtol-led-luminaire/wikis/Home

Advantages & Applications

Low power (<7W) AC/DC converter suitable for LED emergency lighting applications. Suitable for radiation doses up to 1 kGy in the current form, with potential for extension up to 10 kGy with component substitution.


  • Input Voltage: 230V AC RMS
  • Voltage Tolerance: +/-10%
  • Input Frequency: 50Hz
  • Frequency Tolerance: +/- 0.5Hz
  • Maximum power: 7W (measured at input terminals)
  • Voltage Output: As LED requirements
  • Current Output: As LED requirements
  • Earthing Regime: IT
  • Relevant standards to be observed: IEC 61000-3-2, EN 55015, EN
  • 50082-1, EN 50082-2
Released under the CERN Open Hardware License. Full details of the design can be found at the link above.