I have a digital timer i gave up on! hope you get the heat you need bud.
Had the exact same issue with my timer last week. Found a badass 2 plug outdoor timer at HD. It has a springed cover for the timer pins, makes it harder to accidentally bump and f up your schedule. Had that happen too. Doh!
If it comes down to spending energy on lights or spending energy on heat its lights for all the way.
They'll do just fine on 24/0 mate! , what's your current lighting?
Those are beautiful ! that sour is a beast