radiant energy, Q

https://dx.doi.org/10.1351/goldbook.R05039
The total energy emitted, transferred or received as radiation in a defined period of time (Q = ∫ Q λ ⁢ d λ). It is the product of radiant power, P, and time, t: Q = P t when the radiant power is constant over the time considered.
Source:
PAC, 1996, 68, 2223 (Glossary of terms used in photochemistry (IUPAC Recommendations 1996)) on page 2268
PAC, 1996, 68, 957 (Glossary of terms in quantities and units in Clinical Chemistry (IUPAC-IFCC Recommendations 1996)) on page 988
ISO 31-5: 1992 (Quantities and Units - Part 5: Electricity and Magnetism.)