Merriam-Webster's Collegiate Dictionary:
light show
light table
light therapy
light trap
light treatment
light water
light-adapted
light-emitting diode
light-fingered
light-fingeredness
light-foot
light-footed
light-handed
light-handedness
light-headed
light-headedly
light-headedness
light-minded
light-mindedly
light-mindedness
light-o'-love
light-of-love
light-rail
light-year
lightbulb
lighten
lighten up
lightener
lighter
lighter-than-air
lighterage
lightface
lightfaced
lightfast
lightfastness
lighthearted
lightheartedly
lightheartedness
lighthouse
lighting
lightish
lightless
lightly
lightness
lightning
lightning arrester
lightning bug
lightning rod
lightplane
lightproof
lights
lights-out
lightship
lightsome
lightsomely
lightsomeness
lighttight
lightweight
lightwood
lign-
lignan
ligneous
ligni-
lignification
lignify
lignin
lignite
lignitic
ligno-
lignocellulose
lignocellulosic
lignosulfonate
lignum vitae
ligula
ligulate
ligule
ligure
liguria
ligurian
ligurian sea
likability
likable
likableness
likasi
like
like a shot
like as not
like crazy
like gangbusters
like hotcakes
like mad
like wildfire
like-minded
like-mindedly
like-mindedness
likeable
liked
