Have replaced a few T12 bulbs with single end LED tube and they work great. Now looking at doing some T8s. Same socket size but have heard some T8 are shunted tombstones (socket pins shorted together) making dual end powered tubes easier (not by much but doesn't require new tombstones). The brand I have used for bulbs, Hyperikon, seems to have limited selection of dual end powered bulbs but other suppliers have them. Wondering which is more popular and likely to be most available in the future.