What people in the LED community fail to realise is that the T12 and T8 flourescent tubes are really really good at what they do. They are very efficient, (more efficient than the production LEDs you can buy today), far cheaper to make and realitively long lifed. Until LEDs have improved their efficiency by another 50% its pointless anyone trying to make a replacement for the T12 and T8 use in general office type lighting.
In specialist lighting it does make sense but they didn’t win the job on the basis of unit cost or efficiency. Unfortunately no optic will help anyone beat the T12 and T8 because using it doesn’t reduce the cost over bare LEDs and it doesn’t create more Lumens.
The secret to sales success is in understanding LEDs strengths and playing to them.
Unfortunately LEDs are not yet ready to take the standard T8 and T12 on in a straight fight. Currently the wall-plug efficiency of an LED replacement is not as high and the cost is 10x more, so why would anyone want them if they haven’t got some other reason to purchase it?