lantern
Tumbler
ray as in a ray of light
gals
heavy
ceiling?
something that ends with poo
class
Pane .
Vitro
panes
Beaker.
The word is lest. It means for fear that or in case.
A seven letter word for "sheds light" is lantern.As in "pass me that lantern".
Tumbler
goblet
cash
bead