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- i
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Classes starting with L
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(cycle) Alternation of a light-time and dark time (preferred notation LD aa:bb, L cc-dd; aa, bb in h; cc, dd, in clock time: for instance LD 16:8, L 07-23 h). In contrast to constant light (LL) and constant darkness (DD).
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(Cycle): Event(s) occurring either at a time basis of 29.53 days (synodic month, based on moon-phases resulting from orbital positions of moon, sun and earth) or at a time basis of 27.32 days (the sidereal moon cycle around earth, relative to distant stars).
