Initial Quantity
Target PPFD, crop area and fixture PPF support initial sizing, but theoretical coverage alone is not the final fixture quantity.
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Greenhouse Lighting Engineering
Greenhouse Lighting Plan & DIALux Design
Turn greenhouse dimensions, crop requirements and target PPFD into a practical fixture layout, then validate spacing, mounting height, light distribution and uniformity before installation.
Project brief
Start With Your Greenhouse, Crop and Lighting Target
A commercial greenhouse lighting design starts with the actual greenhouse structure and production plan, not a generic coverage estimate.
Still defining the overall approach? Review the Greenhouse Supplemental Lighting System page first.
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01
Crop and Production Stage
Crop type, growth stage and the lighting objective for the production area.
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02
Greenhouse Drawing
Bay dimensions, roof and truss geometry, crop rows and usable growing area.
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03
Mounting Conditions
Available hanging positions, grow light mounting height and structural obstructions.
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04
Target PPFD
The required PPFD at the agreed crop-level calculation plane.
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05
Existing Infrastructure
Current fixtures, electrical conditions and constraints for new-build or retrofit work.
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06
Project Priorities
Uniformity, installed load, fixture count, maintenance access and implementation limits.
Engineering logic
From Target PPFD to Fixture Quantity and Layout
In greenhouse LED lighting design, the initial calculation establishes a design range. Mounting height, fixture spacing, optical distribution and greenhouse geometry then determine how that range becomes a practical fixture layout.
- 01 / InputTarget PPFD + Growing Area
- 02 / FixtureFixture PPF
- 03 / GeometryMounting Height + Optics
- 04 / ConstraintRows + Hanging Positions
- 05 / OutputQuantity + Spacing + Layout
Fixture Spacing
Fixture spacing must align with bay widths, crop rows, suspension points, service routes and other structural constraints.
Optical Distribution
Beam distribution is a design variable. It is selected with mounting height and geometry, not maximized as an isolated specification.
Model and verify
Validate the Lighting Plan Before Installation
DIALux greenhouse lighting work combines geometry, photometric data, fixture arrangement and PPF or spectral information to evaluate light distribution at the defined calculation plane.
- Average PPFD352 μmol/m²/s
- Minimum / Maximum PPFD335 / 369 μmol/m²/s
- PPFD Uniformity95.3%
- Mounting Height3.5m
Average PPFD is not enough. A review also considers the calculation area, minimum and maximum values, greenhouse light uniformity and fixture quantity.
Real project layouts
How Optical Layout Changes With Project Conditions
The 140° and 150° layouts below are based on real DIALux calculations from a commercial greenhouse project currently in production. They were designed for different greenhouse areas, mounting heights and fixture schedules, so the results should not be read as a controlled beam-angle test.
Instead, they show how optical distribution is selected together with greenhouse geometry, mounting height, fixture quantity and the required light distribution.
| Engineering item | 140° Layout | 150° Layout |
|---|---|---|
| Greenhouse area | 19,426 m² | 60,160 m² |
| Mounting height | 2.20 m | 3.50 m |
| Fixture schedule | 924 × 1200 W | 4,416 × 1250 W + 128 × 1050 W |
| Total fixture count | 924 | 4,544 |
| Average PPFD | 257 µmol/m²/s | 352 µmol/m²/s |
| Min. / Max. PPFD | 206 / 292 µmol/m²/s | 335 / 369 µmol/m²/s |
| PPFD uniformity (Min / Avg) | 80.4% Min/Avg · 70.7% Min/Max | 95.3% Min/Avg · 90.8% Min/Max |
| Installed power | 1.109 MW | 5.654 MW |
| Calculation surface | 4 × 5 m | 227.59 × 205.56 m |
Project-specific basis: Greenhouse area, mounting height, fixture schedule and calculation surface are defined separately for each layout.
Engineering principle: The widest beam is not automatically the best choice. Optical distribution is selected around the actual greenhouse geometry and required light distribution.
Note: These layouts represent different areas and design conditions within the same real commercial greenhouse project. The values are project examples, not a one-variable beam-angle comparison.
Design package
What You Receive From a Greenhouse Lighting Plan
The design package supports technical review, fixture selection, quotation and project coordination.
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Fixture Layout
Planned fixture positions, spacing and orientation aligned with greenhouse geometry.
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Fixture Schedule
Recommended configuration and project quantity tied to the reviewed layout.
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PPFD and Uniformity Map
Modeled distribution and validation results for the agreed calculation area.
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Design Notes
Mounting height, optical distribution and key assumptions that affect implementation.
Engineering handover
From Lighting Plan to Greenhouse Project
The approved design becomes a clear technical reference for fixture configuration, quotation and project coordination.
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01 / DefineConfirm the Design Basis
Align the drawing, crop area, target PPFD, mounting conditions and project constraints.
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02 / ValidateReview Layout and Results
Compare the proposed arrangement, PPFD distribution and uniformity on the same basis.
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03 / ReleasePrepare for Supply
Translate the selected layout into a fixture schedule, technical configuration and project quotation.
Send Your Greenhouse Project
Share your drawing or dimensions, crop, growing area, target PPFD, mounting height and existing lighting conditions.