Glossary
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Electronic ballast

Electronic ballasts are a modern replacement for conventional magnetic ballasts.

Electronic ballasts

  • save energy
  • increase the light yield from lamps
  • make it possible for fluorescent lamps to switch on straight away without the flickering
  • automatically switch off defective lamps
erythemal irradiance

There is  a spectrally different sensitivity to get a sunburn.
Only a small dose of UVC radiation is enough to cause a sunburn, which would correspond with an average does of UVB and a larg dose of UVA.
The erythemal irradiance indicates the ability to cause a sunburn, whether it is caused by UVA, UVB or a mixture of both.
The unit remains W/m².