The best replacement for backlight is inverter.

The best alternatives to backlight are rated as following:
★★★★★  inverter
★★★★★  brightness
★★★  edge led
★★  inverter board
★★  backlight
★★  inverter how to tell
★  edge light led
★  front light
★  power inverter
★  edge light
★  led backlight
★  ccfl
★  direct led
★  ccfl backlight
★  led edge lighting
  edge led backlight
  side light
  inverter is bad
  sidelight
  inverter test
  no backlight

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Speaking about backlight, one probably shouldn't forget about lcd screen.

Other search terms related to backlight and their ratings are:
★★★★★ lcd screen
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Google Trends

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backlight
inverter
brightness