the ones i am refering to are standard 5ft double flu. fittings with electrocnic ballasts ..."make"... you would need to check with your lighting supplier as to which make reacts in what manner...i spoke to my supplier and he told me the same thing today and advised me he was aware of the problem so i asked him why he had not notified us of this issue before...because on numerous occassion i have just removed the whole fitting with the electronic ballast complete and replaced with the old standard fittings with a starter and wire wound ballast.

you live and learn.