I add light at 5am daily year-round. No lights added afternoons/evenings (except a nightlight) that gets turned off after they're on the roosts.
So where I live Sunset is as early as 4:20 pm and as late as 8:29 pm.
Egg production gradually slows starting in October, Daily production stopped December, and resumed in February.
No eggs were produced from January 23 to February 1st.
I got 7 eggs ending February 8, sunset was 5:06.
14 eggs, ending February 15, sunset was 5:15.
So far this week 16 eggs, sunset today will happen at 5:32.
My first full carton this year.
. It didn't stay full. Right after I took picture, I removed 2 for breakfast.
I was getting tired of pancakes several times weekly.
My chickens are 5 Barred Rocks 18 months old and 2 Golden Comets 46 months old. One is retired, hasn't laid an egg since June.
Only 3 Barred Rocks are laying. 4 have finished their molt 1 is still growing feathers.
.
So for me the magic number is 12 hours of light needed to produce eggs in the second winter.
New pullets may lay without adding light their first winter. GC
ETA; update, just found 2 eggs, so 3 today, 18 this week. Don't expect to find anymore today.
So where I live Sunset is as early as 4:20 pm and as late as 8:29 pm.
Egg production gradually slows starting in October, Daily production stopped December, and resumed in February.
No eggs were produced from January 23 to February 1st.
I got 7 eggs ending February 8, sunset was 5:06.
14 eggs, ending February 15, sunset was 5:15.
So far this week 16 eggs, sunset today will happen at 5:32.
My first full carton this year.

I was getting tired of pancakes several times weekly.
My chickens are 5 Barred Rocks 18 months old and 2 Golden Comets 46 months old. One is retired, hasn't laid an egg since June.
Only 3 Barred Rocks are laying. 4 have finished their molt 1 is still growing feathers.

So for me the magic number is 12 hours of light needed to produce eggs in the second winter.
New pullets may lay without adding light their first winter. GC
ETA; update, just found 2 eggs, so 3 today, 18 this week. Don't expect to find anymore today.
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