It’s light musical fare which doesn’t get in the way of conversation

light upon

light as a feather

light at the end of the tunnel

Light come, light go

light bulb moment

to light a cigarette

to light a fire

to light a fire under someone

to light the way for someone

to light up

light

light blue

to lighten up

Lightening never strikes twice in the same place

On a lighter note, we are planning a party before the summer holidays

Lightning strikes more trees than blades of grass

lightning fast

It’s like a monkey house in here.

It’s like a toaster, the ref’s shirt pocket. Every time there’s a tackle, up pops a yellow card.

as like as two peas in a pod

like a knight in shining armour

like a scalded cat

I like yoga.

I'd like to go for a ride in the boat.