The best replacement for t12 bulbs is t8.

The best alternatives to t12 bulbs are rated as following:
★★★★★  t8
★★★★  t8 bulbs
  t5 bulbs

Your alternative for t12 bulbs is not listed? Suggest!
Speaking about t12 bulbs, one probably shouldn't forget about t8 ballast.

Other search terms related to t12 bulbs and their ratings are:
★★★★★ t8 ballast
You have in mind a companion for t12 bulbs and it is not yet here? Propose!



Google Trends

Scale is based on the average worldwide traffic of t12 bulbs in all years. Click on graph for more.
t12 bulbs
t8
t8 bulbs