Backlight rhymes with:
acolyte, calite, candlelight, carmelite, cryolite, daylight, flashlight, floodlight, footlight, genlyte, headlight, highlight, impolite, inflight, israelite, lazulite, limelight, mandalite, midflight, moonlight, niccolite, overflight, satellite, searchlight, skylight, skylite, socialite, spotlight, starlight, stoplight, sunlight, sunlite, twilight
Backlight sounds like:
backlist, backlisted, backlogged, bicyclist