Lux levels are quoted by all IP camera manufacturers to indicate the low light level capabilities of their cameras.
The problem is that the lux scale means nothing to most of us, and we are often asked to give an indication of just what is meant by 1.0 lux or 0.01 lux.
Somehow, us saying “quite dark” or “very dark” never seemed very satisfactory!
We checked with Wikipedia:
The lux (symbol: lx) is the SI unit of illuminance and luminous emittance. It is used in photometry as a measure of the apparent intensity of light hitting or passing through a surface. It is analogous to the radiometric unit watts per square meter, but with the power at each wavelength weighted according to the luminosity function, a standardized model of human brightness perception. In English, “lux” is used in both singular and plural.
That’s that cleared up then! 😉
We don’t really think that the information on the Wikipedia page is quite what our CCTV camera enquirers are looking for, so we’ve created our own lookup lux chart with indicative pictograms to give you a visual representation of relative lux light levels.
Click the link to view the chart as a pdf – Lux Light Level Chart.
We hope that’s helpful?
You might also be interested in our article on IRE and Lux Levels.
If there’s any other CCTV terminology that we can de-mystify for you then please feel free to get in touch and let us know. You can use the comments below or visit our IP CCTV Forum.