cyplight and cypball by lester molina from cuba

During the II World War, Cypridina Hilgendorfi, an organic sedimentation of the Japan deep sea, that was obtained in big quantities leaving submerged ceramic vessels with bait, got a curious use, when using it in campaign to read messages without having to always appeal to the dangerous sheaf of light of a lamp. For it, simply expanded it a pinch of the powder on the hand and then, after humidifying it:

THE LIGHT WAS ENOUGH FOR THE READING

Encyclopedia of the Sea / The bottom of the Sea / page 56
Oceanic expeditions / William Beebe 1783
Spallanzani 1788

Crystalline Cypridina Luciferin
By Osamu Shimomura, Toshio Goto and Yoshimasa Hirata November, 1957

File01 Cyplight. Bioluminiscent lamp that lights when the capsule of water is pressed and it fades when cypridine dries off.

File02 Cypball. Bioluminiscent lamp that lights and it turns off alone according to the cycle of days and nights