Lighting Programs for Broilers and Layers, Explained

Walk into a layer house in Kasoa at 5am and flick the switch. If the birds are already stirring, singing, moving to the feeders, you are doing something right. If they sit dull in the corners at midday with the shed dark under a cloudy harmattan sky, you are quietly leaving eggs on the table. Light is not decoration in a poultry house. It is a management input as real as feed and water, and in Ghana most small farms treat it as an afterthought.

Here is the thing farmers miss: light drives the bird's clock. It tells a broiler when to eat and rest, and it tells a pullet's ovary when to start producing. Get the programme wrong and you either grow lazy, leg-weak broilers or you push pullets into lay too early and end up with a flock of small, cracked eggs and prolapse cases. This guide lays out what actually works on Ghanaian farms, open-sided and controlled alike.

Why light matters more than farmers think

A chicken senses day length through the eye and, unusually, through light-sensitive cells deep in the brain. That signal sets appetite, activity and, in females, the release of the hormones that trigger egg formation. Increasing day length is read by the body as "the good season is coming, breed now". Decreasing day length says "slow down". That single fact explains almost every lighting rule you will ever read.

Intensity matters too, measured in lux. Bright light stimulates activity and, at the wrong stage, aggression and feather pecking. Dim light calms birds. In a broiler house you start bright so chicks find feed and water, then dim as they grow. In a layer house you keep it bright enough to stimulate lay but not so bright that you invite pecking and cannibalism, which is a real problem in Ghana's hot open sheds.

Broiler lighting: grow them, then let them rest

For the first 2–3 days a broiler chick needs almost constant light, 22–23 hours, so it never struggles to find the feeder or drinker in the brooder. This is the same window covered in our guide on how to brood day-old chicks, and lighting is part of that brooding job, not separate from it.

From about day 5 to 7, introduce a real dark period. Four to six hours of genuine darkness lets the birds rest, reduces sudden death syndrome and leg problems, and actually improves feed conversion because rested birds eat more efficiently. A common practical programme in Ghana is 18–20 hours light with a 4–6 hour dark block through the growing period, brightening again for the last few days before sale so birds feed hard and gain that final weight for the festive market.

Layer and pullet lighting: patience during rearing

Rearing a future layer is an exercise in restraint. During the growing phase, roughly 6 to 16 weeks, you must not let day length increase, because that signals the pullet to start laying before her body is ready. In an open-sided house in Ghana you cannot shorten the natural day, so the practical rule is simple: never add artificial morning or evening light to growing pullets. Let them grow to frame and body weight on natural daylight only.

Get pullets to target body weight before you touch the lights. A Lohmann Brown or ISA Brown that hits her weight is ready to be stimulated; an underweight pullet that you light-stimulate anyway will lay small eggs, run out of reserves and drop off peak fast. Weigh a sample every week and compare to the breed guide.

Stepping layers up to 16 hours

Once pullets reach around 16–18 weeks and target weight, you begin adding light, and this is where extra eggs come from. Start by adding roughly 30 to 60 minutes per week until total day length (natural daylight plus your bulbs) reaches about 16 hours a day. In most of southern Ghana natural daylight sits near 12 hours, so you are adding about 4 hours with artificial light, usually split as an early morning block before dawn and an evening block after dusk.

The iron rule: once you are increasing light, you never decrease it during the laying period. Cutting hours mid-lay causes a partial moult and a production crash that can take weeks to recover. Buy a cheap timer switch. Doing this by hand every morning at 4am works until the day you oversleep or travel, and the flock feels it.

Bulbs, cost and load-shedding realities

LED bulbs have changed this maths. A house that once ran hot, power-hungry incandescent bulbs can now light the same floor for a fraction of the electricity, which matters when the ECG bill lands. Use warm-white LEDs, space them so light is even along the feed and drink lines, and keep them clean; dust on a bulb in a dusty deep-litter house can cut usable light in half. Hang them at a height that lights the birds, not the roof.

Power cuts are the honest weakness of any Ghanaian lighting programme. For layers especially, a missed morning light block is a missed stimulation. A small inverter and a couple of deep-cycle batteries, or a modest solar setup, pays for itself in eggs held on the curve during dumsor. If you cannot afford backup yet, at least protect the morning block, because that is the one the birds respond to most strongly.

Common lighting mistakes on Ghanaian farms

The big four: running broilers on 24-hour light and losing birds to leg and heart failure; light-stimulating underweight pullets and getting a flock of pee-wee eggs; reducing layer light hours mid-lay and triggering a crash; and leaving dark corners where a quarter of the flock quietly under-performs. None of these show up as a dramatic death event. They show up as money that never arrives, which is why they go unnoticed for months.

A fifth, subtler one: ignoring intensity entirely. Two houses can both run 16 hours and get very different results because one is evenly lit at the right lux and the other is either glaring or gloomy. If you are serious about eggs, walk your house at bird level and look at what the hen actually sees.

Frequently asked questions