Metal a/c seem to do well with lightning. But what about composites? AAIB report into a Super Puma ditching -- lightning strike caused a composite tail-rotor blade to fail -- suggested that lightning protection standards were set way too low because the failure occurred at an unexpectedly high charge, four or five times higher than the max envisaged in the standard. Then and now, there haven't been enough lightning encounters with planes with a high proportion of composites to see this work out in real life. The current standards may be good enough for metal, but possibly not for composites. Interesting question for A380 and B787.