Mercury light source, 20W low pressure discharge lamps for spectral work. Delivers approximately 100 lux at 20 cm with prominent lines at 434.7, 546.0, 577.0, and 579.1 nm as well as many faint lines.
Periodic table of spectra makes it clear to students that each element has its own spectral fingerprint, Poster Heading: Emission Spectra of Elements, Size: 24 x 36in