why is the empennage not lighting?

[ThibaudBenjaminVandenhoven]

I'm not an expert of the A310 but i thought if i activate the nav&logo it will still on for the whole flight but is not... is it an automatic system in the aircraft?

Edited October 22 by ThibaudBenjaminVandenhoven
spelling mistake

[Eddie]

Hi there,

I'm not exactly sure what the issue here is. Could you please clarify? Much appreciated

Thank you

[ThibaudBenjaminVandenhoven]

Well when i'm on the ground the stabiliser lights illuminate the empennage, But when i'm in the air the stabiliser lights do not illuminate the empennage but i didn't move the switch "Nav&logo" to off