the world > matter > light > artificial light > an artificial light > artificial light defined by light-source > electric light > [adjective] > of or relating to light bulbs of specific type (6)
Of a light bulb: made of translucent white glass; (of a lamp) containing such a bulb.
Designating an electric light bulb that is frosted on the inside so as to diffuse the light.
Designating or relating to a light bulb which is designed so that its beam is focused automatically when it is fitted inside a lamp, esp. a…