The Compact Fluorescent Light (CFL) is an effective and cheap calibration light source for spectrometers - recently I discovered a source of 12V bulbs which has allowed me to make safe effective lights for portable use in the field. I have attached a version of the spectrum of a CFL bulb I have generated to allow easy access to the information required for calibration, annotated with the wavelengths of the main lines. I am indebted to Wikipedia for the source information on which this is ba