“light bulb”

22 symbols from Material Design Icons

lightbulb

head-lightbulb

home-lightbulb

lightbulb-cfl

lightbulb-group

lightbulb-multiple

lightbulb-off

lightbulb-on

lightbulb-outline

head-lightbulb-outline

home-lightbulb-outline

lightbulb-cfl-off

lightbulb-cfl-spiral

lightbulb-group-off

lightbulb-group-outline

lightbulb-multiple-off

lightbulb-multiple-outline

lightbulb-off-outline

lightbulb-on-outline

lightbulb-cfl-spiral-off

lightbulb-group-off-outline

lightbulb-multiple-off-outline