Amount of light from sun that reach/reflected-by the moon as the earth revolves the sun.
One week corresponds approximately to one lunar phase.
Any specific lunar phase can be observed only at the time when that lunar phase occurs, and not again for 29.53 days thereafter.
The lunar phase that precedes a full moon in the lunar cycle is the waxing gibbous phase. This phase occurs when the moon is more than half illuminated but not yet full.
Full.
We do . . . Full.
full moon phase
Full Moon.
Only at the Full phase.
waxing gibbous
Full Moon
Yes.
Only during a full moon.