10:00 - 15:00 then 17:00 - 22:00
10 hours total.
I have a 2 hour blackout 15:00 - 17:00 because.
1/ No one is in the house so the shutters are closed giving a near total blackout
2/ It's nice to watch the fish at night.
After seeing Pauly post with LED moonlights though i will be going for a set of those so might skip the midday blackout then.
Cheers
Mark