The information is from the A350 spec jun '11 not from last week.
Withholding information is also a 'marketing strategy'.
You are seriously worried about A380 emergency lighting?
What about the installed but - not mentioned - approx.
40! wireless emergency lighting Li-Ion batteries,
2 Li-Ion Flight Control BackUp batteries and the
2 Li-Ion indepent power supplies to the recorders in B787?