I've seen quite a few LED tubes in commercial installations here so someone must believe in the viability.
A "downside" I can see in retrofit situations is if a non-technical user attempts subsequent maintenance using a conventional tube. Stupid? Yes, but I've met a lot of people who think that if any lamp physically fits it must be OK. I do believe that retro-fits should be clearly labelled, "Caution LED tubes only".
Since moving house 18 months ago I have equipped with almost entirely LED lamps in a range of styles, though not tubes. The biggest difficulty I found was judging the wattage needed for subjective comfort levels. I guess this was done from experience with incandescents, so will come with experience. Afterthought: With an estimated 40+ lamps I've only had one premature failure, and that was very early.

Last edited by geoff in UK; 03/04/15 04:17 PM.