I know they use reduced maintenance costs as an excuse but that sounds very ridiculous for me...
My company, with a fleet of 32 Boeings, did a study last year and found that we spent circa GB£140,000 on Logo Light bulbs.
I can quite understand why an airline wants to get rid of a non-mandatory item like this. We have no order to not use them, it is left to the pilots' discretion, but more and more pilots are only turning them on when on the ground at night, or below 10,000' on approach....and before you ask, apparently it's the duration that they are on for that leads to failure, not the heat/ cool cycle of switching them on/off...
PP