R2-H 120–277V Inter-Canopy Grow Light Driver

FAHOLD R2-H 120–277V inter-canopy grow light drivers are ultra-narrow non-isolated single-channel constant-current power solutions for inter-lighting, bottom-fill, under-canopy and supplemental horticulture fixtures. The series is designed for space-constrained linear grow lights using high-voltage LED strings.

Current R2-H models cover 60W, 100W, 150W, 200W, 240W and 320W with a common 180–260Vdc output platform. Type B configurations support 0(1)–10V / PWM dimming, offline programmable current setting and no-afterglow shutdown, with optional 12V auxiliary power for compatible fixture electronics.

Compare the six models below by wattage, LED voltage, output-current requirements and fixture size. FAHOLD also supports electrical matching, programmable-output configuration, datasheets, samples and OEM/ODM inter-canopy lighting projects.

6 products

R2-H 120–277V Inter-Canopy Grow Light LED Drivers

FAHOLD R2-H is an ultra-narrow non-isolated single-channel constant-current LED driver platform developed for inter-canopy lighting, bottom-fill lighting, under-canopy fixtures and other supplemental horticulture luminaires where installation space is limited.

The current 120–277Vac R2-H range includes 60W, 100W, 150W, 200W, 240W and 320W models. All six products use a 180–260Vdc LED output window, allowing the series to support high-voltage LED-string architectures in slim linear grow-light fixtures.

R2-H differs from high-power top-light platforms such as R4, H2 or R6-V. Its primary focus is compact fixture integration, programmable constant-current output and practical control for lighting installed closer to or within the crop canopy.

R2-H 60W to 320W Model Range

The six current R2-H models allow fixture manufacturers to scale the same general electrical architecture across several inter-canopy and supplemental lighting power classes.

Power ClassRated InputOutput VoltageTypical Fixture Direction
60W120–277Vac180–260VdcCompact inter-canopy, propagation and supplemental lighting bars
100W120–277Vac180–260VdcLower-power bottom-fill and slim linear horticulture fixtures
150W120–277Vac180–260VdcMedium-power inter-lighting and under-canopy fixtures
200W120–277Vac180–260VdcHigher-output commercial inter-canopy fixtures
240W120–277Vac180–260VdcHigh-output linear grow-light bars and supplemental fixtures
320W120–277Vac180–260VdcHighest-power fixtures in the current 120–277V R2-H range

Wattage alone should not determine model selection. The LED string's minimum and maximum forward voltage, required operating current and final fixture power must all remain within the electrical limits of the selected driver.

Inter-Canopy LED Drivers for Commercial Horticulture

Inter-canopy lighting positions LED fixtures inside or between crop rows instead of relying only on overhead top lighting. This creates different power-supply requirements because the fixture often needs to fit within a narrow mechanical space close to foliage.

R2-H is designed around this type of installation. Its slim linear enclosure allows the driver to be integrated into compact horticulture bars while the 180–260Vdc output architecture supports long high-voltage LED strings.

For commercial growers and luminaire manufacturers, inter-canopy driver selection should consider not only power but also fixture width, driver height, cable routing, humidity, LED-board voltage and the required dimming strategy.

Bottom-Fill and Under-Canopy Grow Light Drivers

Bottom-fill and under-canopy fixtures are used to deliver additional light below the upper canopy where overhead fixtures may not provide sufficient penetration.

These luminaires typically use slim housings and are installed in restricted spaces around crop structures. An ultra-narrow driver architecture can simplify mechanical integration while keeping the power supply close to the LED load.

R2-H is suitable for compatible bottom-fill and supplemental lighting designs when the fixture uses one regulated 180–260Vdc LED load and its power requirement falls within the 60W–320W range.

120–277Vac Input for Commercial Grow Facilities

All current products on this R2-H category page use a 120–277Vac rated-input platform. This covers common commercial lighting supply conditions such as nominal 120Vac, 208Vac, 240Vac and 277Vac.

The AC input voltage is separate from the LED output specification. A fixture supplied from 277Vac can still use an R2-H driver that provides regulated 180–260Vdc constant-current output to the LED string.

For horticulture facilities using higher-voltage 347V or 480V-class distribution, compare the

R2-H 200–480Vac Inter-Canopy Grow Light Drivers
.

180–260Vdc LED Drivers for High-Voltage Horticulture Strings

R2-H uses a 180–260Vdc constant-current output platform across the current 120–277Vac product range. This makes it suitable for horticulture LED boards designed around relatively long, high-voltage LED strings.

Higher LED-string voltage allows useful fixture power to be delivered at lower current than a low-voltage, high-current architecture. This can influence PCB layout, conductor sizing, connector requirements and the mechanical design of a slim horticulture fixture.

Because R2-H is a non-isolated platform, the LED output and complete fixture safety architecture must be evaluated carefully. Insulation, accessible parts, PCB spacing, wiring, connectors, enclosure construction and certification requirements should all be considered together.

Ultra-Narrow 44mm-Class Grow Light Driver Design

One of the key advantages of R2-H is its ultra-narrow mechanical format. Current product documentation identifies a 44mm-class enclosure width, allowing the driver to fit into slim linear grow-light structures where conventional wider power supplies may be difficult to integrate.

The 60W model, for example, uses an enclosure approximately 150 × 44 × 32mm. Driver length increases with power, so mechanical drawings should be reviewed before final fixture tooling, mounting-point design or cable routing.

This narrow profile is especially valuable in inter-canopy and bottom-fill fixtures that must remain compact around crop rows.

Programmable R2-H Horticulture LED Drivers

R2-H supports offline programmable current setting on compatible Type B configurations. This allows supported operating parameters to be configured within the electrical limits of the selected driver.

For OEM grow-light manufacturers, programmability can help standardize one driver platform across multiple fixture SKUs. A common electrical and mechanical platform may be used with different programmed current settings when all operating points remain inside the permitted voltage, current, power and thermal limits.

Programming requirements should be defined before production so the driver configuration, finished fixture specification and product label remain consistent.

0–10V Dimmable Inter-Canopy LED Drivers

Compatible R2-H Type B configurations support 0(1)–10V control for commercial horticulture lighting systems. This allows inter-canopy and supplemental fixtures to adjust output according to cultivation stage, crop requirements, facility schedules or centralized lighting-control strategies.

Controller signal range, wiring and actual driver compatibility should be validated during fixture development because different lighting-control systems can implement analog dimming differently.

PWM Dimming for Supplemental Grow Lighting

R2-H also supports PWM control on compatible configurations. PWM can be useful when the horticulture fixture is integrated with a controller or automation platform that provides a pulse-width modulation signal.

Signal voltage, frequency and control wiring should be confirmed against the selected driver configuration before final production.

No-Afterglow Shutdown for Grow-Light Schedules

The R2-H platform includes no-afterglow shutdown behavior on applicable configurations. This helps prevent visible residual LED glow after the fixture is commanded off.

A clean off state can be useful in controlled-environment agriculture where scheduled dark periods are part of the crop-lighting strategy. The complete controller, driver and LED load should still be validated together when low-end dimming and shutdown behavior are important.

Optional 12V Auxiliary Power

The R2-H model-code system provides an optional A12 configuration with a 12V / 200mA auxiliary supply for compatible fixture electronics.

This auxiliary output can support suitable controls or other low-voltage electronics inside the luminaire without requiring an additional small power supply.

The 12V auxiliary option is configuration-dependent and should be specified during project development rather than assumed to be included with every R2-H driver.

Type B Control Configuration

Current R2-H product documentation identifies Type B as the dimmable and programmable configuration. It combines 0(1)–10V / PWM control with offline current programming.

FunctionR2-H Direction
Analog Dimming0(1)–10V on compatible Type B configuration
PWM ControlSupported on compatible Type B configuration
Offline ProgrammingProgrammable current setting within supported operating limits
Auxiliary PowerOptional A12 12V / 200mA configuration
Shutdown BehaviorNo-afterglow design

The exact configuration should always be confirmed when requesting samples or production quotations.

Power Factor and Efficiency for R2-H Drivers

Current R2-H product data lists power factor above 0.96 and typical efficiency ranging from approximately 93% to 97% depending on model and operating point.

Efficiency is important in inter-canopy fixtures because the driver is often installed inside a compact housing with limited space for heat dissipation. Lower electrical losses can help reduce thermal load around the driver and LED boards.

Actual efficiency depends on input voltage, LED operating point, programmed output and thermal conditions, so fixture-level testing remains important.

Surge Protection for Commercial Horticulture Fixtures

Current R2-H product documentation specifies DM 6kV / CM 6kV surge protection together with short-circuit, over-current and over-temperature protection.

These driver-level protections should be combined with correct facility grounding, branch-circuit protection and fixture-level electrical design, particularly in large commercial cultivation installations.

R2-H Applications in Horticulture Lighting

Inter-Canopy Lighting

R2-H is designed for slim fixtures installed within crop canopies where mechanical width, power density and controlled dimming are important.

Bottom-Fill Lighting

The compact linear architecture makes R2-H relevant to fixtures positioned below the main crop canopy to supplement light reaching lower leaves and fruiting zones.

Under-Canopy Lighting

Compatible under-canopy fixtures can use R2-H when one high-voltage LED load requires 60W to 320W and the installation uses 120–277Vac commercial power.

Supplemental Horticulture Lighting

R2-H can also support linear supplemental grow-light fixtures that require programmable constant-current operation and external 0–10V or PWM control.

60W–150W R2-H Drivers for Compact Fixtures

The 60W, 100W and 150W R2-H models are suited to compact inter-canopy and bottom-fill fixtures where low profile and limited thermal footprint are priorities.

Current product data lists approximately 0.12–0.30A for the 60W model, 0.25–0.50A for the 100W model and 0.38–0.75A for the 150W model, all within the common 180–260Vdc platform.

The exact operating current should be selected from the LED string requirements rather than simply using the maximum available current.

200W–320W R2-H Drivers for Higher-Output Inter-Canopy Lighting

The 200W, 240W and 320W R2-H models extend the same slim 120–277Vac architecture into higher-output inter-canopy and supplemental lighting fixtures.

These higher-power models are relevant where more LED output is required but the luminaire still benefits from a narrow linear driver rather than a larger top-light power platform.

Because voltage, current and thermal load increase in importance at higher fixture power, model matching should be completed from the LED-board electrical specification and the latest driver datasheet.

R2-H 120–277V vs R2-H 200–480V

FAHOLD provides two R2-H input-voltage branches for different horticulture facility electrical systems.

PlatformRated InputCurrent Power DirectionTypical Facility
R2-H120–277Vac60W / 100W / 150W / 200W / 240W / 320WCommercial facilities using 120V, 208V, 240V or 277V-class lighting circuits
R2-V-H200–480Vac60W / 120W / 150W / 200WHigh-voltage facilities using compatible 277V, 347V or 480V-class distribution

Both branches use a 180–260Vdc output architecture, but they should be selected according to the actual facility AC supply and the power requirement of the fixture.

For the high-voltage range, compare

R2-H 200–480Vac Inter-Canopy LED Drivers
.

R2-H vs R4 Grow Light Drivers

R2-H and R4 are both non-isolated single-channel horticulture platforms, but they serve different fixture classes.

RequirementR2-HR4
Primary ApplicationInter-canopy, bottom-fill and compact linear horticulture lightingHigh-power commercial grow lights and LED bar fixtures
Power Direction60W–320W400W–1200W across the wider R4 family
LED Output Platform180–260Vdc210–360Vdc
Mechanical DirectionUltra-narrow 44mm-class platformSlim high-power platform

Choose R2-H for compatible lower- and medium-power inter-canopy fixtures where narrow mechanical integration is a priority. For higher-power commercial single-channel systems, compare

R4 120–277Vac High-Power Grow Light Drivers
.

How to Select the Right R2-H Inter-Canopy LED Driver

  1. Confirm the facility AC input.
    Verify that the fixture will operate from a supply within the 120–277Vac rated-input range.
  2. Define the LED forward-voltage range.
    Provide the minimum, nominal and maximum voltage of the LED string.
  3. Confirm compatibility with 180–260Vdc.
    The complete LED operating range must remain inside the R2-H voltage window.
  4. Determine the required output current.
    Match the LED operating current to the supported current range of the selected model.
  5. Select the correct power class.
    Choose from 60W, 100W, 150W, 200W, 240W or 320W according to the actual LED electrical load.
  6. Define the dimming requirement.
    Confirm whether the fixture uses 0(1)–10V or PWM control.
  7. Define the programmed current.
    If offline programming is required, specify the target operating current before production.
  8. Determine whether 12V auxiliary power is required.
    Specify the A12 option when compatible fixture electronics need a local low-voltage supply.
  9. Review mechanical and thermal conditions.
    Check driver dimensions, mounting location, fixture width, heat dissipation and cable routing.
  10. Confirm safety and certification requirements.
    Because R2-H uses a non-isolated high-voltage output architecture, review enclosure, insulation, accessible parts and target-market compliance before production approval.

R2-H Inter-Canopy LED Driver Manufacturer for OEM Fixtures

Inter-canopy lighting requires closer coordination between the LED board, driver and fixture mechanics than a generic grow-light power supply. LED-string voltage, current, programmed power, driver width, dimming interface, auxiliary electronics and installation conditions can all affect the correct driver configuration.

FAHOLD supports R2-H model matching, programmable-output evaluation, technical datasheets, samples and OEM/ODM horticulture projects. For accurate pre-selection, provide the facility AC input, LED voltage range, required current, maximum fixture wattage, dimming method, mechanical constraints, auxiliary-power requirements, target certification and expected quantity.

For the broader product category, return to

Non-Isolated Single-Channel Grow Light Drivers
.
For application-level horticulture matching, review

FAHOLD Grow Lighting LED Driver Solutions
.

Frequently Asked Questions

What is the FAHOLD R2-H inter-canopy LED driver?

FAHOLD R2-H is an ultra-narrow non-isolated single-channel constant-current LED driver platform for inter-canopy, bottom-fill, under-canopy and supplemental horticulture lighting. The current 120–277Vac range covers 60W to 320W with a 180–260Vdc output platform.

What wattages are available for R2-H 120–277V grow light drivers?

The current R2-H 120–277Vac range includes 60W, 100W, 150W, 200W, 240W and 320W models. The correct model should be selected according to LED voltage, operating current, maximum power and fixture requirements.

What output-voltage range does the R2-H Series use?

All current R2-H models on this 120–277Vac category use a 180–260Vdc constant-current output platform. The connected LED string's complete forward-voltage range must remain within this operating window.

Is R2-H suitable for inter-canopy and bottom-fill grow lighting?

Yes. R2-H is specifically positioned for professional inter-canopy, bottom-fill and supplemental horticulture fixtures. Its ultra-narrow 44mm-class construction is designed for space-constrained linear grow-light installations.

Does R2-H support 0–10V and PWM dimming?

Yes. Compatible R2-H Type B configurations support 0(1)–10V and PWM control together with offline programmable current setting. Control wiring and controller compatibility should be confirmed for the selected project.

Are R2-H inter-canopy LED drivers programmable?

Yes. R2-H Type B configurations support offline programming for output-current setting within the supported electrical range of the selected driver. This can help OEM fixture manufacturers configure related product variants from a common driver platform.

Does R2-H provide a 12V auxiliary output?

An optional A12 configuration provides a 12V / 200mA auxiliary supply for compatible fixture electronics. This option is configuration-dependent and should be specified when requesting samples or production units.

What is the difference between the 120–277V and 200–480V R2-H drivers?

The 120–277Vac R2-H range currently includes 60W, 100W, 150W, 200W, 240W and 320W models. The high-voltage 200–480Vac branch currently includes 60W, 120W, 150W and 200W models. Both use a 180–260Vdc output platform, but they are designed for different facility AC distribution systems.

What is the difference between R2-H and R4 grow light drivers?

R2-H is designed primarily for 60W–320W inter-canopy, bottom-fill and slim linear horticulture fixtures using a 180–260Vdc LED output platform. R4 is a higher-power non-isolated platform for commercial grow lights and LED bar fixtures using a 210–360Vdc output architecture.

What information should I provide when selecting an R2-H inter-canopy driver?

Provide the facility AC input, LED string minimum and maximum forward voltage, required operating current, maximum fixture wattage, dimming method, programmed-current requirement, available driver space, auxiliary-power requirement and target certification.

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