To determine the number of 18W LED tube lights (1200mm) needed for an 88m × 14m poultry house with 24,000 chickens, follow this step-by-step analysis based on poultry lighting standards:
1) Key Parameters:
House Area:
88m×14m=1,232m288m×14m=1,232m2.
Lighting Requirements for Poultry:
Broilers (meat chickens): 20–40 lux (standard).
Layers (egg production): 10–20 lux (resting) to 30–50 lux (feeding areas).
Assumption: Assuming broilers (common for high-density houses), target 30 lux for uniform coverage.
LED Specifications:
18W, 1200mm LED tube (typical efficiency): ~1,800 lumens (100 lm/W).
Beam angle: 120° (standard for uniform spread).
2) Calculation:
Step 1: Total Lumens Required
Total lumens=Area×Target lux=1,232m2×30lux=36,960lm.Total lumens=Area×Target lux=1,232m2×30lux=36,960lm.
Step 2: Lumens per Fixture
Each 18W LED tube supplies 1,800 lm.
Step 3: Minimum Fixtures Needed
Minimum fixtures=36,960lm1,800lm/fixture≈20.5→21 fixtures.Minimum fixtures=1,800lm/fixture36,960lm≈20.5→21 fixtures.
3) Practical Adjustments for Poultry Housing:
Uniformity & Layout:
Lights must cover 3 feeding lines and 4 drinking lines evenly.
Mounting height: Typically 2–3m above birds.
Spacing: For 30 lux uniformity:
Space fixtures ≤ 1.5× mounting height.
Example (2.5m height → max 3.75m spacing).
Layout Plan:
Width (14m): Install 3 rows of lights (aligning with feeding lines).
Length (88m):
Spacing: 3.75m between fixtures → 88m÷3.75m≈23.588m÷3.75m≈23.5 → 24 fixtures per row.
Total fixtures: 3rows×24fixtures/row=72 fixtures3rows×24fixtures/row=72 fixtures.
Validation:
Total lumens = 72×1,800lm=129,600lm72×1,800lm=129,600lm.
Actual lux = 129,600lm1,232m2≈105lux1,232m2129,600lm≈105lux (exceeds 30 lux target).
Why? Higher initial lux accounts for:
Light depreciation (dust, aging).
Shadow mitigation from equipment.
Zonal flexibility (e.g., brighter light over feeding lines).
4) Factors Influencing the Result:
Chicken type:
Broilers: 72 fixtures (30 lux) supports growth.
Layers: Reduce to ~50 fixtures (20 lux sufficient).
Light schedule: Dimming controls may reduce fixture count.
Daylight integration: Skylights could lower requirements.
Regulations: Local codes may specify minimum lux (e.g., EU requires 20 lux for poultry).
5) Recommendation:
Use 72pcs × 18W LED tubes for broilers (30 lux coverage).
Installation:
Mount lights above feeding lines (critical activity zones).
Use reflectors to minimize shadows from drinking lines.
Include dimmable drivers to adjust light for bird age/behavior.
Energy & Cost:
Total power: 72×18W=1,296W72×18W=1,296W.
Daily energy (12h): 1.296kW×12h=15.55kWh1.296kW×12h=15.55kWh.
Consult a poultry lighting specialist company like BENWEI Lighting to validate lux levels and spacing for your breed.
Note: 24,000 chickens in 1,232 m² = 19.5 birds/m² – ensure ventilation and space comply with welfare standards (e.g., RSPCA recommends ≤ 33 kg/m² for broilers).
