R4-V 200–480V High-Power Grow Light Driver
FAHOLD R4-V 200–480V high-power grow light drivers are non-isolated single-channel constant-current power solutions for commercial horticulture fixtures, greenhouse luminaires and professional LED grow-light systems using high-voltage facility distribution. The series combines a slim programmable architecture with a 210–360Vdc output platform for high-voltage LED-string designs.
Current R4-V models cover 400W, 600W, 800W, 1000W and 1200W, with full-power output-current capability from approximately 1.05A to 4.50A depending on model. Compatible Type B configurations support offline programming, 0–10V / PWM / resistor dimming, Dim-to-Off and soft-start, while all current R4-V models use an IP65 enclosure platform.
The 200–480Vac input range makes R4-V particularly relevant to commercial horticulture facilities using 277V, 347V or 480V-class electrical distribution. Compare the five models below by wattage, LED voltage window, output current and control requirements.
R4-V 200–480V High-Voltage Grow Light LED Drivers
FAHOLD R4-V is the high-voltage input branch of the R4 non-isolated single-channel constant-current LED driver platform. It is designed for commercial grow lights, greenhouse fixtures, LED bar luminaires and professional horticulture systems operating from 200–480Vac electrical infrastructure.
The current R4-V range covers 400W, 600W, 800W, 1000W and 1200W. All five models use a 210–360Vdc constant-current output platform together with offline programmable output and a slim linear enclosure designed for high-power-density fixture integration.
R4-V is particularly relevant to projects using 277V, 347V or 480V-class facility distribution. Final driver selection should be based on the complete LED forward-voltage window, required output current, maximum fixture power and control requirements rather than wattage alone.
Compare R4-V 400W, 600W, 800W, 1000W and 1200W Models
| Power Class | Rated Input | Output Voltage | Full-Power Output Current | Typical Efficiency |
|---|---|---|---|---|
| 400W | 200–480Vac | 210–360Vdc | 1.05–1.90A | 96.0% |
| 600W | 200–480Vac | 210–360Vdc | 1.40–2.80A | 96.0% |
| 800W | 200–480Vac | 210–360Vdc | 1.70–3.40A | 96.5% |
| 1000W | 200–480Vac | 210–360Vdc | 2.10–4.20A | 97.0% |
| 1200W | 200–480Vac | 210–360Vdc | 2.10–4.50A | 97.0% |
All five products share the same broad 210–360Vdc output-voltage architecture, but their available current and maximum power differ. The LED load must remain inside both the voltage and current operating limits of the selected driver.
200–480Vac Grow Light Drivers for High-Voltage Horticulture Facilities
R4-V is designed for commercial horticulture installations using high-voltage AC distribution. Its 200–480Vac rated-input platform covers several common commercial and industrial lighting voltages without requiring separate 277V, 347V and 480V driver families.
This makes R4-V especially relevant to large grow rooms and greenhouse projects where high-voltage distribution is used across a significant number of high-power luminaires.
Always verify the actual facility supply, branch-circuit design and applicable electrical requirements before driver selection.
347V Grow Light LED Drivers
347Vac is commonly associated with commercial lighting infrastructure in some North American projects. Because R4-V uses a 200–480Vac rated-input platform, compatible models can be considered for grow-light fixtures supplied from 347V-class systems.
The LED-side requirements remain independent from the AC input. A fixture supplied from 347Vac may still use a 210–360Vdc regulated constant-current LED string on the output side.
For project approval, confirm the selected driver configuration, luminaire safety architecture and applicable certification requirements for the target installation.
480V Grow Light Drivers for Commercial Greenhouses
Large horticulture facilities may use 480V-class electrical distribution to supply high-power lighting across substantial cultivation areas. R4-V provides 400W through 1200W options within a 200–480Vac rated-input platform for compatible commercial projects.
At 480V-class input, the complete installation must be engineered appropriately for high-voltage operation, including branch protection, grounding, connectors, wiring, luminaire insulation and service access.
The driver input range should not be confused with the LED output. R4-V converts the high-voltage AC facility supply into regulated 210–360Vdc constant-current power for the LED load.
210–360Vdc Constant-Current Output for High-Voltage LED Strings
All current R4-V models use a 210–360Vdc LED output platform. This high-voltage constant-current architecture is designed for long LED-string configurations used in professional horticulture fixtures.
Compared with low-voltage, very-high-current LED architectures, higher LED-string voltage allows substantial fixture power to be delivered at lower DC current. This can influence output wiring, connector ratings, PCB layout and fixture power density.
Because R4-V uses a non-isolated architecture, LED-side voltage and accessible parts must be considered carefully within the complete luminaire safety design.
400W R4-V High-Voltage Grow Light Driver
The 400W R4-V model provides a 210–360Vdc output window with approximately 1.05–1.90A full-power current capability. It is the lowest-power product in the current R4-V family.
This configuration is suitable for compatible commercial horticulture fixtures that require high-voltage facility input but do not need the 600W–1200W output capability of larger R4-V models.
600W R4-V Grow Light LED Driver
The 600W R4-V model provides approximately 1.40–2.80A across the same 210–360Vdc constant-current platform.
It is relevant to commercial LED bar grow lights and greenhouse luminaires requiring a balance between high-voltage input compatibility, programmable output and moderate high-power fixture capacity.
800W R4-V Programmable Grow Light Driver
The 800W R4-V model provides approximately 1.70–3.40A full-power output current and reaches approximately 96.5% typical efficiency.
This power class is suitable for high-output commercial grow-light systems where long operating hours make efficiency, thermal management and output programmability important design factors.
1000W 200–480V Grow Light Driver
The 1000W R4-V model provides approximately 2.10–4.20A within the 210–360Vdc output window and reaches approximately 97% typical efficiency.
The combination of a 200–480Vac input range and 1kW power class makes this platform relevant to large commercial grow rooms and greenhouse fixtures operating from high-voltage facility infrastructure.
At this power level, driver mounting, LED-board thermal behavior, output cabling and luminaire cooling should all be considered together.
1200W 480V-Class Grow Light Driver
The 1200W R4-V model is the highest-power product in the current R4-V single-channel range. It provides approximately 2.10–4.50A full-power current capability across the 210–360Vdc output platform.
Typical efficiency is approximately 97%, helping limit driver losses in commercial horticulture fixtures operating for long daily cycles.
The 1200W power class is particularly relevant to professional high-output grow-light systems where one regulated LED load is used rather than a multi-channel architecture.
Offline Programmable High-Voltage Grow Light Drivers
R4-V supports offline programmable output. Supported electrical parameters can be configured within the operating limits of the driver to match different LED-board current requirements, fixture wattages or OEM product variants.
Programmability can help luminaire manufacturers standardize one R4-V hardware platform across multiple grow-light SKUs instead of using a completely different driver for every output-current target.
The programmed operating point must remain within the voltage, current, power and thermal limits of the selected R4-V model.
0–10V Dimming for 200–480V Grow Lights
Compatible R4-V Type B configurations support 0–10V control for commercial horticulture lighting systems. This allows light output to respond to crop stages, facility schedules, daylight strategy and centralized environmental-control systems.
The controller, wiring and driver interface should be validated together before production because different 0–10V systems can use different electrical implementations.
PWM and Resistor 3-in-1 Dimming
Type B R4-V configurations also support PWM and resistor-based control, creating a 3-in-1 dimming platform for different commercial grow-light control architectures.
| Control Method | Typical Use | Selection Consideration |
|---|---|---|
| 0–10V | Greenhouse and commercial cultivation controllers | Confirm signal range, wiring and controller compatibility. |
| PWM | Fixture controllers and horticulture automation | Confirm signal level, frequency and electrical interface. |
| Resistor / Rx | External resistance-based output adjustment | Confirm the supported resistance range and configuration requirements. |
Control functions depend on the selected configuration and should be defined when samples or production units are specified.
Type B vs Type N R4-V Configurations
| Configuration | Control Capability | Typical Requirement |
|---|---|---|
| Type B | Programmable with 0–10V / PWM / resistor 3-in-1 dimming | Commercial grow lights requiring external intensity control |
| Type N | Non-dimmable configuration | Fixed-output horticulture fixtures |
Specify the required dimming configuration during product selection rather than assuming every R4-V model is supplied with the same control interface.
Dim-to-Off for Controlled-Environment Agriculture
Compatible R4-V Type B configurations support Dim-to-Off operation. This allows the LED output to shut down at the lower control threshold rather than leaving visible residual light.
A defined dark period can be important in controlled-environment horticulture, so low-end control behavior should be tested with the actual controller, driver and LED load.
Soft-Start for High-Power Horticulture Fixtures
Compatible R4-V configurations also support soft-start behavior for controlled fixture startup.
Soft-start can support predictable power-up behavior in high-power grow-light systems and should be evaluated together with facility electrical conditions and the intended lighting-control system.
Optional RJ12 and Knob Dimming
R4-V supports optional RJ12 and knob-dimming configurations for fixtures requiring local manual control or a convenient external control connection.
These functions are configuration-dependent and should be specified as part of the OEM driver configuration.
Optional 12V Auxiliary Output
A 12V auxiliary-output configuration is also available for compatible R4-V products. It can supply appropriate low-voltage fixture electronics, sensors or control components.
The auxiliary-output requirement should be defined together with the dimming interface and programmable-output settings before production.
96–97% Typical Efficiency for High-Power Grow Lights
High conversion efficiency is important in commercial horticulture because driver losses become both additional electricity consumption and heat within the luminaire or cultivation environment.
Current R4-V technical data lists approximately 96% typical efficiency for the 400W and 600W models, 96.5% for the 800W model, and 97% for the 1000W and 1200W models. Typical power factor is above 0.95 across the current R4-V range.
Actual efficiency depends on AC input voltage, LED operating point, programmed output, ambient temperature and fixture thermal conditions.
IP65 High-Voltage Horticulture LED Drivers
All current R4-V models use an IP65 enclosure platform for professional horticulture and other high-power lighting applications.
IP65 applies to the driver enclosure and does not automatically make the complete grow-light fixture IP65. Cable entries, connectors, seals, luminaire housing, mounting orientation and installation environment must also be designed appropriately.
SCP, OVP and OTP Protection
R4-V includes short-circuit protection, over-voltage protection and over-temperature protection to support high-power LED fixture integration.
These driver-level protection functions should be combined with appropriate facility grounding, branch-circuit protection, enclosure design and fixture-level thermal engineering.
Slim 400W–1200W Grow Light Driver Design
R4-V uses a slim linear enclosure designed for high power density inside commercial LED grow-light fixtures.
The 400W model is approximately 85mm wide, while the higher-power current models are approximately 89mm wide. Driver length increases as power rises, with the 1000W and 1200W R4-V models using the longer high-power enclosure.
Mechanical drawings should be reviewed before fixture tooling, mounting points or internal cable routing are finalized.
R4-V Applications in Commercial Horticulture
High-Voltage Greenhouse Lighting
R4-V is suitable for compatible greenhouse lighting projects where the facility uses high-voltage electrical distribution and each fixture operates as one regulated high-voltage LED load.
Commercial Indoor Grow Rooms
Large indoor cultivation facilities can use the 200–480Vac R4-V platform when the building electrical infrastructure and LED fixture architecture match the driver's input and output requirements.
High-Power LED Bar Grow Lights
The slim linear enclosure, 210–360Vdc output architecture and programmable operation make R4-V relevant to professional LED bar fixtures that require substantial power from limited driver installation space.
How to Select the Right R4-V 200–480V Grow Light Driver
- Confirm the facility AC voltage.
Verify that the actual project supply is compatible with the 200–480Vac rated-input platform. - Define the LED forward-voltage range.
Provide the minimum, nominal and maximum voltage of the LED load. - Confirm compatibility with 210–360Vdc.
The complete LED operating range must remain inside the R4-V output window. - Determine the required output current.
Compare the LED operating current with the available range of the 400W, 600W, 800W, 1000W or 1200W model. - Select the correct power class.
Use the actual maximum electrical LED load rather than fixture marketing wattage alone. - Define the dimming method.
Specify 0–10V, PWM, resistor control or non-dimming operation according to the fixture-control system. - Define the programmed operating point.
If offline programming is required, specify the target current and power during project configuration. - Specify optional interfaces.
Confirm whether RJ12, knob dimming or 12V auxiliary output is required. - Review thermal and environmental conditions.
Check IP65 integration, mounting, operating temperature and luminaire cooling. - Confirm high-voltage safety and certification requirements.
Review the complete non-isolated luminaire design, facility voltage, insulation, wiring and target-market compliance before production approval.
R4 vs R4E vs R4-V Grow Light Drivers
R4, R4E and R4-V use the same broader non-isolated high-power platform and 210–360Vdc output architecture, but they serve different facility-input requirements.
| Platform | Rated Input | Power Range | Typical Selection Scenario |
|---|---|---|---|
| R4 | 120–277Vac | 400W–1000W | Projects requiring operation from common 120V through 277V commercial supplies |
| R4E | 200–277Vac | 500W–1200W | Projects standardized around 208V, 240V or 277V-class infrastructure |
| R4-V | 200–480Vac | 400W–1200W | High-voltage horticulture projects requiring 347V or 480V-class compatibility |
For applications that must also support nominal 120Vac, compare
R4 120–277Vac Grow Light Drivers
.
For commercial projects limited to the 200–277Vac range, compare
R4E 200–277Vac Grow Light Drivers
.
R4-V vs Isolated 200–480V Horticulture Drivers
R4-V uses a non-isolated 210–360Vdc high-voltage LED output architecture. This is different from isolated high-voltage-input horticulture platforms such as H1-V, which provide galvanic separation between the AC input and LED output.
The correct architecture depends on the complete grow-light design, LED operating voltage, accessible parts, insulation strategy and certification requirements. Input voltage alone should not determine whether an isolated or non-isolated driver is selected.
R4-V Grow Light Driver Manufacturer for OEM Fixtures
High-voltage horticulture fixture development requires accurate coordination between facility power, driver and LED load. AC input, LED forward-voltage range, output current, programmed power, dimming interface, auxiliary functions, mechanical space, thermal conditions and certification requirements can all affect the correct driver configuration.
FAHOLD supports R4-V model matching, offline-programming evaluation, technical datasheets, samples and OEM/ODM horticulture projects. For accurate pre-selection, provide the facility AC voltage, LED voltage range, required current, maximum fixture power, dimming protocol, optional interfaces, target certification and expected quantity.
For the broader product category, return to
Non-Isolated Single-Channel Grow Light Drivers
.
For complete R4-V dimensions, model coding, configuration options and technical specifications, review the
R4 High-Power Non-Isolated Grow Light LED Driver Series
.
Frequently Asked Questions
What is the FAHOLD R4-V 200–480V grow light LED driver?
FAHOLD R4-V is a high-power non-isolated single-channel constant-current LED driver platform for commercial horticulture fixtures using high-voltage facility power. The current range includes 400W, 600W, 800W, 1000W and 1200W models with 200–480Vac input and 210–360Vdc output.
Can R4-V grow light drivers operate on 347V or 480V systems?
Yes. Current R4-V models use a 200–480Vac rated-input platform, making them suitable for compatible commercial horticulture systems using 347V or 480V-class electrical distribution. The exact fixture, branch circuit and certification requirements must still be verified.
What wattages are available for R4-V grow light drivers?
The current R4-V range includes 400W, 600W, 800W, 1000W and 1200W models. Final selection should also consider the LED voltage range and required output current rather than wattage alone.
What output-voltage range does the R4-V Series use?
All current R4-V models use a 210–360Vdc constant-current output platform for high-voltage LED-string architectures. The complete forward-voltage range of the connected LED load must remain within this operating window.
How much output current can R4-V grow light drivers provide?
Current R4-V models provide approximately 1.05–1.90A at 400W, 1.40–2.80A at 600W, 1.70–3.40A at 800W, 2.10–4.20A at 1000W and 2.10–4.50A at 1200W.
Are R4-V horticulture LED drivers programmable?
Yes. The R4-V platform supports offline programmable output. Supported parameters can be configured within the electrical limits of the selected driver to match different LED-board currents, fixture wattages and OEM product requirements.
Does R4-V support 0–10V, PWM and resistor dimming?
Yes. Compatible Type B configurations support 0–10V, PWM and resistor-based 3-in-1 dimming together with Dim-to-Off and soft-start. Type N is the non-dimmable configuration.
What is the difference between R4, R4E and R4-V grow light drivers?
R4 uses 120–277Vac input, R4E uses 200–277Vac input and R4-V uses 200–480Vac input. All three use the broader R4 non-isolated 210–360Vdc output architecture, but their power options and facility-voltage requirements differ.
How efficient are R4-V grow light drivers?
Current R4-V models are listed at approximately 96% typical efficiency for 400W and 600W, 96.5% for 800W and 97% for 1000W and 1200W. Typical power factor is above 0.95 across the current range.
How do I choose the correct R4-V grow light driver?
Start with the facility AC voltage and confirm that it falls within the 200–480Vac input range. Then verify that the LED load fits within the 210–360Vdc output window and match the required current and maximum power to the 400W, 600W, 800W, 1000W or 1200W model. Finally confirm dimming, programming, auxiliary-interface, IP and certification requirements.
