The answer is no. Nav lights are at pilots discretion, it's fine to turn them off during daylight hours. We tend to only switch ours off in bright sunshine, in cloudy conditions or at night they stay on. The beacon needs to be on when the a/c is capable of moving under its own power (switched on during the push / start checks, off during shutdown checks). The strobes go on when entering an active runway, off when exiting one and stay on in flight. Landing / taxi lights are to taste, but it's normal to have at least one white light on on the ground (for the subsequent board of enquiry) and landing lights on at all times below 10000ft.
HTH
LD
Last edited by Locked door; 21st Sep 2012 at 17:57.