Differnce between bright half and dark half​

I’m assuming you’re asking about the moon, if correct, here is the In bright half , the bright part of the moon increases whereas In dark half , the dark part of moon increases. Bright half starts from a new moon day and ends on a full moon day whereas dark half starts from a full moon day and ends on a new moon day.

Answer steam fog;

Icant awnser the qustion bc u have the planets not listed