| Subject | English | German |
| opt. | actually transmitted quantity of light | tatsächlich durchgelassene Lichtmenge |
| meas.inst. | quantity of light | Beleuchtung |
| tech. | quantity of light | Lichtmenge |
| anal.chem. | quantity of light | Lichtenergie |
| opt. | quantity of light | Lichtmenge (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr) |
| opt. | quantity of light | Lichtarbeit (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr) |