This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
Three xenon flashtubes and krypton arc lamp. NoCoins en The first three from the top are xenon flashtubes The bottom one is krypton arc lamp which has smaller diameter higher pressure thinner glass for better cooling and cathode with sharp tip The anodes are on the right hand side and the cathodes are on the left The second flashtube