Just another opinion for you on adding extra light - chickens have natural phases they go through, and by adding light, you're actually disturbing those natural phases. JUST my two pennies.
Many, many chickens do not lay in winter, but the days are now getting longer, so they should naturally begin laying again for you soon!
Many, many chickens do not lay in winter, but the days are now getting longer, so they should naturally begin laying again for you soon!