If others have had similar experiences to mine, it depends upon what one means by "efficiency". Per what I recently wrote above, I am now paying about half as much to run LED tubes than it was costing to run the fluoros they replaced, with the LED ones, perceptively, seemingly providing similar amounts of illumination (where I wanted the illumination).I'll even offer they are more efficient.
'Numbers' can be misleading, but less money going out of my pocket, without any apparent deterioration in what I'm getting for my money, is a fairly straightforwardfact.