Radiation source containing mercury at a pressure of ca
. 8 MPa (ca
. 80 bar) or higher which emits lines over a background continuum between about 200 and 1400 nm.
PAC, 1996, 68, 2223. 'Glossary of terms used in photochemistry (IUPAC Recommendations 1996)' on page 2246 (https://doi.org/10.1351/pac199668122223)