LED Grow Light Engines for Lettuce Production
Commercial lettuce production needs more than a general-purpose grow light. The lighting system must fit the cultivation area, deliver the required photon output evenly across the canopy, operate efficiently for long photoperiods and integrate with the structure of the greenhouse, hydroponic installation or vertical farming rack.
At Lumistrips, we provide linear and rectangular LED light engines for lettuce production, ranging from ready-made LED strips and modules to fully customized horticultural lighting systems.
More light for the crop. Less unnecessary hardware around it.
A Lumistrips light engine typically consists of:
LED strip or LED module + LED driver
Depending on the installation, it can also include an aluminium profile, optical lenses, cables, connectors and a lighting controller.
You match the components to your rack, your gutter pitch and your crop plan. The result is consistently cheaper per delivered µmol/s, more energy efficient at system level, and capable of higher PPFD at the canopy than an equivalent fixture installation.
There is one real trade-off, and we will not pretend otherwise: a light engine has to be installed. Fixtures arrive assembled and hang on a hook. If your project has no installation resource and no electrical contractor, that matters. On every other axis the light engine wins, and the reason is structural rather than marketing.
A Modular Alternative to Conventional LED Grow Light Fixtures
Most commercial grow lights are supplied as complete, enclosed fixtures. This approach is convenient, but it can also introduce unnecessary cost, weight and duplication—particularly in large vertical farms where dozens or hundreds of fixtures may each contain their own driver and control electronics.
Our modular approach separates the light-producing components from the supporting system.
Multiple LED strips or modules can, when the electrical design allows it, be powered and controlled by a common LED driver or controller. Aluminium profiles and optics are added only where they are technically required. The result is a lighting system that can be more closely matched to the dimensions and construction of the cultivation area.
A light engine also delivers superior PPFD at lower capital cost per watt. Where the fixture wastes photons in its housing and delivers them to whatever footprint its optic was designed for with our modular approach you can place the light where the crop is — at the row pitch your shelf actually needs — so a higher proportion of emitted photons land on leaves.
Why our light engine is more efficient
Compared with a conventional fixture-based installation, a properly designed LED light engine system can provide:
More PPF for Your Lighting Budget
A larger share of the project budget can be invested directly in high-performance LEDs instead of individual fixture housings and duplicated electronics. This can provide more installed photosynthetic photon flux (PPF) per euro and improve the economics of larger growing installations.
Easy Integration into Growing Systems
Our low-profile LED strips, bars and modules can be integrated directly into vertical farming shelves, hydroponic channels, propagation racks and greenhouse structures. The lighting system can follow the cultivation geometry instead of forcing the grower to design the installation around a fixed-size fixture.
More Photons Reaching the Crop
LEDs can be distributed according to the actual dimensions of the tray, shelf or growing channel. With the correct mounting height, spacing and optical design, this helps direct a higher proportion of the emitted photons onto the crop canopy and achieve the required PPFD and uniformity.
Designed Around the Grower's Needs
The spectrum, PPF, PCB type, module dimensions, LED arrangement, optics and electrical architecture can all be adapted to the application. From full-spectrum white to white + deep red or multi-channel systems, the light engine can be designed around the crop, growing system and production objectives.
Competitive System Cost
Several LED light engines can be powered and controlled together using appropriately sized professional components . Fewer individual housings, drivers and control units mean fewer duplicated components, helping reduce the installed system cost—especially across hundreds of growing trays.
Made in Germany for Leading Reliability
We manufacture the light engine in Germany using LEDs from leading manufacturers such as Nichia, Cree LED, ams OSRAM and Lumileds. The modular architecture allows for components to be replaced separately, helping reduce lifetime maintenance and operating costs.
Lifetime you can specify, and audit
A fixture gives you one lifetime figure and no way to check it. Published spec sheets for competing bar fixtures state fixture wattage and photon output but not LED count, so the forward current each emitter actually runs at cannot be derived from them — and forward current, together with case temperature, is what sets lifetime.
For example, with Nichia's 757 LEDs, holding case temperature constant while dropping current from 150 mA to 30 mA extends projected L90 by at least 2.5 times; holding current constant while dropping case temperature from 105 °C to 55 °C does the same. Both levers are invisible to the buyer of a sealed unit.
We work the other way. Every emitter we qualify — Nichia, Cree, OSRAM, Lumileds, Seoul Semiconductor — comes with LM-80 test data and TM-21 projections for the specific part, and we can supply that report together with the drive current and design case temperature for your configuration. Lifetime becomes something you specify and verify, not something you are told.
Want longer service life? Lower the current and add LED density; we will show you the projection and the cost.
Spectral stability follows the same two levers and matters more in horticulture than in general lighting, because a recipe that drifts is no longer the recipe you validated. Chromaticity shift at the low-current, low-temperature operating point is roughly a quarter of what the same device shows driven hard and hot.
Ready-Made LED Grow Lights for
Small Lettuce Projects
(plant areas below approximately 30 m²)
Light engines for small indoor farms, research installations, propagation areas and compact hydroponic systems can be built using our existing LED strips and modules. These products are available in practical output levels and can be combined with suitable LED drivers and aluminium profiles.
Configurable LED Grow Light Bars
for Medium Lettuce Projects
(for plant areas up to approximately 250 m²)
Medium-size vertical farms, hydroponic installations and commercial production rooms often require more output per linear metre than flexible LED tape can provide.
For these projects, we offer configurable MaxLine aluminium LED strips using Nichia Rs060 Hortisolis white horticultural LEDs. The aluminium PCB transfers heat efficiently into a suitable profile or heatsink and supports higher operating power than a standard flexible strip.
The products are supplied in 280 mm sections and can be arranged to match the length and width of the growing area.
Illustrative LED component cost per growing tray
For a standard 2.4 × 1.2 m vertical-farm tray, an indicative LED strip or module cost is approximately €650–€830 per tray at qualifying project quantities.
This estimate is based on a design objective of approximately 200 µmol·m⁻²·s⁻¹ average PPFD at crop-canopy level. The final product quantity and layout depend on mounting height, LED spacing, optical distribution, required uniformity, surrounding reflectance and the dimensions of the plantable area.
Important: This is a non-binding component-cost example, not a quotation for a complete installed lighting system.
Fully Custom LED Grow Light Systems
for Large Lettuce Farms
(for large-scale projects, generally above 500 m²)
Large vertical farms, greenhouse projects and OEM growing systems require a lighting solution designed around the complete facility rather than an individual LED product.
For these applications, we develop fully customized linear or rectangular LED light engines. The design can include the LEDs, spectrum, PCB, module dimensions, optics, thermal interface, profiles, drivers and control system.
Choose the LED Technology
We work with horticultural and general-lighting LEDs from leading manufacturers, including:
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Nichia
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Cree LED
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ams OSRAM
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Lumileds
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Seoul Semiconductor
This gives us the flexibility to select LEDs according to the required spectrum, photon efficacy, output, lifetime, package size, optical compatibility and project budget.
For white-light systems, options include specialist horticultural white LEDs such as Nichia Hortisolis, high-efficiency white LEDs and high-colour-rendering CRI 95 solutions. Dedicated deep-red, blue and far-red LEDs can be added when a multi-channel or crop-specific spectrum is required.
Select the Spectrum Strategy
The spectrum can be configured for the lettuce cultivar, production stage and control strategy.
Available approaches include:
Red + Blue | A narrow-spectrum approach for applications in which visual working light is not a priority and the spectral design is intentionally limited to selected red and blue wavelengths. | |
White + Red + Deep-red | A configurable solution for projects that require a broader spectrum and separate control of deep/far-red radiation. | |
White + Red + Blue | A multi-channel system providing independent control over important spectral regions while maintaining useful white light for workers and crop inspection. | |
White + Deep red | A white base combined with efficient deep-red photons. The two channels can be operated together or controlled separately, depending on the system design. | |
White | A practical solution for crop growth, visual inspection and comfortable working conditions. White light simplifies the lighting architecture while covering the visible spectrum with a single LED type. |
Choose the PCB Construction
The PCB is selected according to power density, module geometry, thermal requirements and installation method.
Flexible PCB | Manufactured using our reel-to-reel process for long, lightweight LED strips that can be cut, arranged or integrated into custom structures. | |
Aluminium PCB | Recommended for higher-power linear modules that require an efficient thermal path into an aluminium profile or heatsink. | |
Rigid FR4 PCB | Suitable for large rectangular modules, multi-row matrices and applications in which the LEDs must be distributed over a broad surface. |
Design the
physical format
The physical format of the LED light engine should follow the shape of the cultivation area.
Linear LED strips and bars are well suited to:
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NFT channels
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Narrow hydroponic beds
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Vertical farming shelves
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Propagation racks
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Long greenhouse rows
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OEM growing systems
Rectangular and multi-row LED modules are well suited to:
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Standard growing trays
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Deep-water culture beds
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Raft systems
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Wide shelves
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Propagation tables
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Large cultivation surfaces requiring distributed light
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The PCB length, width, LED arrangement and connection points can all be customized.
Optical Control Where It Adds Value
LED optics are not necessary in every lettuce installation. At a short mounting distance, a carefully arranged array of LEDs can often provide the required distribution without secondary lenses.
Where the mounting height, shelf width or mechanical layout demands greater optical control, we can integrate horticultural optics from LEDiL.
Optics can be selected to:
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Spread light across a wider growing area
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Direct photons away from walkways and structural surfaces
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Improve edge-to-edge PPFD uniformity
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Compensate for greater mounting distances
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Reduce the number of LED bars required
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Adapt the beam to narrow or asymmetric growing areas
Optical selection is made together with LED spacing and mounting geometry. A lens cannot correct an unsuitable system layout on its own.
Profiles and Thermal Management
Efficient thermal management supports LED performance and lifetime. We can supply aluminium profiles from our existing range or source project-specific profiles for higher-power and mechanically customized systems.
Depending on the design, the profile can perform several functions:
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Transfer heat away from the LED PCB
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Provide mechanical support
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Create mounting points
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Protect wiring
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Hold covers or optics
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Simplify integration into the growing rack
For installations in which the rack or growing structure already provides a suitable thermal and mechanical interface, unnecessary profile components can be omitted.
Drivers, Dimming and Lighting Control
We design both constant-voltage and constant-current systems.
The correct architecture depends on the LED module, cable length, number of connected light engines, dimming method and control requirements.
Several modules can be grouped on appropriately selected drivers, reducing the need for a separate power supply and controller at every lighting point.
This is one of the main economic advantages of the Lumistrips light engine approach.
Available system functions can include:
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On/off switching
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Manual or central dimming
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Multi-channel spectrum control
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Integration with greenhouse or vertical farm controllers
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Separate control of white, red, blue or far-red channels
We work with professional driver and control platforms suitable for industrial and horticultural applications.
One Lighting Platform for Different Lettuce Production Systems
Our LED strips, modules and custom light engines can be adapted to several controlled-environment agriculture configurations.
Vertical farming racks
Low-profile linear bars can be installed beneath each cultivation level. Their dimensions and spacing can follow the shelf width and plant layout, while centralized drivers can serve multiple bars or zones.
Propagation shelves
Lower-output flexible strips or configurable modules can be used for seedlings and young plants where compact dimensions and uniformity are more important than maximum photon output.
Hydroponic NFT systems
Linear LED strips can be positioned parallel to the nutrient channels, creating a lighting pattern that follows the crop rather than illuminating unused space.
Greenhouse supplemental
Custom linear or rectangular modules can be integrated into greenhouse structures with minimal obstruction of natural sunlight. The driver and control system can be designed around larger lighting zones rather than individual fixtures.
Deep-water culture
Rectangular modules or multiple parallel bars can cover wider cultivation areas and distribute photons across the complete raft.
OEM cultivation equipment
We develop LED light engines for manufacturers of growing racks, hydroponic systems, climate chambers, plant research equipment and automated cultivation systems.
From Photon Output to
Canopy-Level Performance
PPF describes the total photosynthetic photon output of an LED strip or module. However, lettuce grows according to the light that reaches the canopy.
The final PPFD distribution depends on:
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Total PPF
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Illuminated area
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Number and spacing of LED strips
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Distance from the LEDs to the canopy
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LED beam distribution
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Presence of optics
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Reflective surfaces
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Edge losses
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Crop height and canopy development
For this reason, selecting a product only by watts, lumens or even total PPF is not sufficient.
A high-output LED bar can still create poor results if the bars are too far apart, while several moderate-output bars may provide better uniformity and more usable light across the complete growing surface.
Our modular system gives designers the freedom to distribute the photon output where it is needed instead of concentrating it inside a small number of conventional fixtures.
What We Need to Design Your Lettuce Lighting System
To recommend or develop a suitable solution, we normally evaluate:
Project information and Why it matters
Project information
Total plant area
Number of cultivation levels
Shelf, tray or bed dimensions
Distance to the crop canopy
Spectrum and PPF/PPFD
Photoperiod and DLI
Lettuce type and growth stage
Indoor or greenhouse installation
Temperature and ventilation
Humidity and cleaning method
Dimming and control requirements
Installation capabilities
Determines the scale of the lighting system
Defines the actual illuminated area
Defines the actual illuminated area
Determines the light engine format
Influences PPFD and uniformity
Establishes the required photon output
Links PPFD to the daily light delivered
Influences the lighting strategy
Determines whether lighting is sole-source or supplemental
Influences thermal design
Determines the required protection concept
Defines the driver and channel architecture
Determines the appropriate level of assembly
Based on this information, we can recommend an existing product or develop a custom light engine
matched to the project.
Build the Lighting System Around the Farm—not the Fixture
A lettuce farm should not have to adapt its shelf dimensions, electrical architecture and cultivation layout to a standard grow-light fixture.
With Lumistrips, the lighting system can be built around the actual growing area.
Choose a ready-made LED strip for a compact installation, configure a high-output aluminium bar for a medium-size facility, or work with us to develop a fully customized LED light engine for large-scale production.
Tell us the dimensions of the growing area, the number of cultivation levels, the mounting height and the required light level. We will help identify the LED modules, drivers, profiles and optical components needed for the project.
Contact Our Engineering Team
LUMISTRIPS
Hechingen, Germany
Kwun Tong, Hong Kong
Ramnicu Valcea, Romania
+40.729.850.710