The lighting requirements of broilers (meat chickens) are different from those of laying hens. The focus is on promoting rapid weight gain, reducing stress and reducing energy consumption. The following are scientific recommendations for the selection of color temperature in broiler farming:
1. Recommended color temperature range
Optimal color temperature: 2700K~4000K
Warm white light (2700K~3000K):
Reduces the activity of the flock, reduces fighting and energy consumption, and is suitable for the late fattening period.
Neutral white light (3500K~4000K):
Balances growth and feeding enthusiasm, suitable for brooding and growing periods.
2. Color temperature adjustment at different stages
(1) Brooding period (0~10 days)
Color temperature: 4000K~5000K (slightly cool white)
Function:
The blue light component in the higher color temperature stimulates the activity of the chicks and promotes feeding and drinking.
The light intensity needs to be high (30~50 lux) to help chicks quickly adapt to the environment.
(2) Growth period (11~30 days)
Color temperature: 3500K~4000K (neutral white)
Function:
Maintain moderate activity and ensure feed conversion rate.
The light intensity is reduced to 10~20 lux.
(3) Fattening period (30 days to market)
Color temperature: 2700K~3000K (warm yellow light)
Function:
Reduce the movement of chickens, reduce energy consumption, and accelerate weight gain.
The light intensity is further reduced to 5~10 lux (even intermittent darkness).
3. Avoid color temperature
Cold white light (>5000K):
Excessive blue light during the fattening period will increase the activity of chickens and lead to energy waste.
Pure red light (<2000K):
May cause pecking and affect the observation of feeding behavior.
4. Key scientific basis
Blue light (450~480nm):
Short-term stimulation of feeding, but long-term exposure will increase stress hormones (such as corticosterone), affecting weight gain.
Warm light (long wavelength):
Inhibits melatonin secretion, reduces activity, and improves feed conversion rate.
5. Other lighting parameters
Light cycle:
Brooding period: 23 hours of light (1 hour of dark adaptation).
After the growth period: gradually reduce to 16~18 hours of light (such as "intermittent lighting" scheme: 1 hour of light + 3 hours of dark).
Uniformity:
Avoid uneven light and dark in the house to prevent chickens from gathering together.
6. Practical application suggestions
LED lamp selection:
Select livestock-specific dimming LEDs with adjustable color temperature (such as 3000K/4000K dual mode), and use a dimmer to control the intensity.
Automated management:
The controller simulates the gradual change of natural light (such as 4000K in the morning, 3500K during the day, and 2700K in the evening).
Example scheme
Stage Color temperature Lighting time Intensity (lux) Purpose
Brooding period 4000K~5000K 23 hours of light 30~50lux Stimulate feeding and reduce mortality
Growing period 3500K~4000K 18~20 hours of light 10~20lux Balance growth and energy consumption
Fattening period 2700K~3000K 16~18 hours of light 5~10 lux Reduce activity and accelerate weight gain
Precautions
Breed differences: Fast-growing large white-feathered broilers (such as Cobb) are more sensitive to light and need to strictly control the intensity; yellow-feathered chickens can be appropriately relaxed.
Stress management: Avoid sudden changes in color temperature during molting or immunization.
Energy efficiency optimization: Warm light LED (such as 3000K) is more energy-efficient than cold light and is suitable for long-term use.
Data reference: Several studies have shown that the feed conversion rate of broilers using 3000K color temperature can be increased by 3%~5% (compared with 5000K). It is recommended to fine-tune according to the actual conditions of the farm and monitor the weight gain curve regularly. you can consult broiler chicken led light and led dimmer from http://www.benweilight.com
