Importance of Lighting

Learn the benefits of supplemental lighting

By: Dr. Rob McCoy

In the northern hemisphere, the amount of daylight peaks with the Summer Solstice in June and gradually decreases until the Winter Solstice in December. As you move north from the equator, the effect becomes more pronounced. The interval in a 24-hour period in which an organism is exposed to light is known as the photoperiod. A reduction in photoperiod leads to a change (some increase and some decrease) in levels of circulating hormones. These hormonal changes can have a profound affect on all living things.

The use of supplemental lighting to maximize egg production in laying hens has been a common management practice for many years. For maximum egg production, the photoperiod should be 14 to 16 hours. Lighting can be from a combination of sunlight and artificial sources and should be continuous. Photoperiod should not be decreased for hens during the laying cycle because this can decrease egg production and induce molt. Conversely, the photoperiod should not be increased for growing pullets because this can hasten egg production and result in undersized eggs.

Light intensity should also be considered. As a general guideline, a 40-watt bulb with a reflector located seven feet above the floor will provide adequate light for an area of 200 square feet. Multiple lights should be used to assure even distribution throughout the building. Incandescent lights are generally best. Also, assure that light fixtures are properly installed and maintained to avoid a fire hazard.

The benefits of photoperiod manipulation have also been documented in dairy cattle and swine. A photoperiod of 16 to 18 hours will result in increased milk production in lactating cows. In swine, seasonal infertility in the sow herd has an adverse effect on reproduction. Many factors contribute to seasonal infertility; photoperiod is one of them. Sows in confinement are commonly exposed to photoperiods of 16 hours. Though best recognized in swine, seasonal infertility probably occurs in all mammals.

Manipulation of photoperiod is an effective management tool that can be used to enhance reproduction and maximize performance. However, proper nutrition is still a critical piece of the puzzle. An animal that is not properly nourished will not perform well, even if everything else is perfect. Trust Manna Pro to help you provide your poultry and livestock with the nutrition they need.

*IMPORTANT NOTE: The information included on this website is for general educational purposes only. Please do not rely on information provided on this website as a substitute for the professional judgment, advice and guidance of your veterinarian relating to the treatment of and care for your animals based on their particular circumstances and needs. Maintaining regular appointments with your veterinarian will help ensure the best care for your animals. Always consult your veterinarian before starting any course of supplementation or treatment for your animals. TSC is not responsible for any loss, injury, or damage allegedly arising from any information or suggestions on this website.

This article courtesy of Manna Pro

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