I pay around £40 inc vat for an led fitting which will out perform and outlast your current fluorescent fittings.
I’ve installed loads which are in use every day for prolonged periods, and have never had one fail yet.
Sadly I've had exactly the opposite issues.
First complaints seem to be the flicker, quickly followed by the horrible multiple shadows and reduced light levels. In larger building we find we're installing aditional fittings to fill the shadows that are now reported, also on a different phase to reduce the flicker effect.
I estimate around 1% of replacements under warranty and 5% in the following year.
I further estimate 5% reversion back to fluo by the end of year 2.
The reversion to fluo costs less than the LED conversion, complaints & faults stop and longevity returns.
I haven't yet found a LED conversion which out performs fluo without additional fittings which seems to be self defeatist and uneconomical.
3 workshops I've worked in had 40W 600mm LED replacement panels in suspended ceilings, No way did they come anyway near the performance of the 72W flou fittings for perceived light levels or shadowfree working. Lucky one of them had the old fittings dumped in the recycling skip and about 1/3rd of them were salvageable by the staff and added to the LED system in one area. The difference is clearly obvious.
One building I get to work in now keep a stock of LED tubes as they need replaceing so frequently, previousely we used to relamp every 4 years with very rare failures between.