You should throroughly check in every place they could
yes they can, depending on how many guppies you plan on getting.
Without light guppies (and most other species of fish) can not see one another so it would be extremely difficult for them to locate one another let alone breed successfully. Therefor I would say that the effect of light would be to 'enable' reproduction of guppies.
Fries (the term for baby guppies), are eaten by older guppies, but guppies are eaten by fish like tuna.
What are guppies
Only guppies breed with guppies naturally.
No, guppies are fish.
Guppies do not migrate.
Guppies are compatible with Bristlenose catfish, the bristlenose being one of a few catfish that can live with guppies because of the guppies' water.
Guppies are guppies are guppies. Tiger just describes their colouring/markings. They are the same in temperament as any other guppy.
The plural of guppy is guppies. The plural possessive is guppies'.
Guppies do not precipitate. Rain does.
Guppies phylum is Chordata