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Long Day Lighting is when you manage your barn’s lighting to operate on a “Long Day Photoperiod” so that lights are on for 16 to 18 hours daily and operating with 15 to 20 foot-candles. Alternatively for 6 to 8 hours the barn is provided with complete darkness, less than 1 foot-candle. While many barns provide night lighting – research shows that cows can find their away around in the dark.
Research Results from Long Day Photoperiod: