The best replacement for t8 lamps is t12.

The best alternatives to t8 lamps are rated as following:
★★★★★  t12
★★★★★  t12 lamps
★★★  t5
★  t5 lamps
  t 12

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Speaking about t8 lamps, one probably shouldn't forget about t12 ballast.

Other search terms related to t8 lamps and their ratings are:
★★★★★ t12 ballast
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