decalumen en · NOUN
Pronunciation
- /ˈdɛkəluːmɪn/ (UK)
Etymology
From deca- + lumen.
Meanings
-
A unit of luminous flux equal to ten lumens.
If the aquarium is placed where it receives insufficient daylight, artificial lighting by means of ordinary incandescent lamps should be employed. For good plant growth 2 decalumens of luminous flux per square decimetre of water surface […]
1956, C. van Duijn, Diseases of Fishes, page 149:
Forms
| Spelling | Features | Labels | Source |
|---|---|---|---|
| decalumens | Number=Plur | lexicographic |