 |
| |||
| Lichtenergie f | |||
| Lichtarbeit f (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr); Lichtmenge f (the product of the luminous flux by the time it is maintained; unit: lumen-hour, Im-hr) | |||
| Lichtmenge f | |||
| Beleuchtung f | |||
|
quantity of light : 1 do fraz, 1 tematyki |
| Optyka | 1 |