Black Dog LED PhytoMAX 4 4S Full Spectrum LED Grow Light

The Black Dog LED PhytoMAX 4 4S is a compact, high intensity 250 watt LED grow light engineered for growers who want more than a conventional white diode fixture. Producing 531 µmol/s of total PBAR output, the 4S combines Black Dog LED's proprietary Phyto Genesis Spectrum with integrated ultraviolet, violet, blue, red, and infrared wavelengths to provide a carefully balanced spectrum from 280 to 800nm.

Designed for approximately a 2.5' x 2.5' vegetative footprint and 2' x 2' flowering footprint, the PhytoMAX 4 4S delivers substantial intensity from a fixture measuring only 15" x 15". This makes it especially useful in tents, cabinets, propagation areas, compact indoor gardens, and supplemental lighting applications where available space is limited but light quality cannot be compromised.

Rather than designing the fixture solely around the highest possible efficiency number, Black Dog LED developed the PhytoMAX platform around plant response and productive growth. Eight different LED colors are blended to influence photosynthesis as well as photomorphogenesis, helping growers maintain compact plant structure, strong canopy development, and productive flowering throughout the complete growth cycle.

Phyto Genesis Spectrum

The defining feature of the PhytoMAX 4 series is Black Dog LED's proprietary Phyto Genesis Spectrum.

While many LED grow lights rely primarily on white diodes with supplemental red, Black Dog uses eight different LED colors selected to provide specific wavelengths across the biologically active spectrum.

The PhytoMAX 4 4S produces:

• PBAR (280–800nm): 531 µmol/s
• UV (280–400nm): 16 µmol/s
• PAR (400–700nm): 476 µmol/s
• IR (700–800nm): 40 µmol/s

This broader spectral approach allows the fixture to deliver wavelengths outside conventional PAR in addition to the light responsible for primary photosynthesis.

Integrated Ultraviolet Light

Approximately 3% of the Phyto Genesis Spectrum consists of ultraviolet light below 400nm.

Rather than requiring separate supplemental UV bars, ultraviolet wavelengths are integrated throughout the fixture so they are distributed across the growing area alongside the rest of the spectrum.

Black Dog LED designed this UV component to encourage compact development and natural plant responses while helping support pigmentation and other desirable characteristics.

Because the ultraviolet light is integrated directly into the spectrum, growers do not need to install or independently control an additional UV fixture.

Violet Light for Deeper Canopy Penetration

Violet wavelengths between approximately 400 and 450nm are included to help deliver useful light deeper into dense plant canopies.

This can improve light availability to foliage and developing growth below the very top of the canopy, helping make better use of the entire cultivated area.

Blue Light for Compact Development

Blue wavelengths between approximately 450 and 480nm support chlorophyll B photosynthesis while influencing plant morphology.

An appropriate concentration of blue light can help encourage tighter internodal spacing and more compact plant development rather than excessive vertical stretching.

Red Light for Strong Photosynthesis

Red light between approximately 600 and 700nm plays a major role in photosynthetic activity.

The Phyto Genesis Spectrum combines strong red output with blue and other wavelengths rather than relying on excessive red alone, helping create a more balanced growing environment.

Infrared and Far Red

The spectrum extends beyond conventional PAR into the 700 to 800nm infrared region, producing approximately 40 µmol/s of IR photon flux.

Properly balanced far red wavelengths can work together with other colors of light to influence photosynthetic efficiency and plant development.

Black Dog carefully balances far red with the rest of the spectrum rather than using it as an isolated supplemental channel.

531 µmol/s From 250 Watts

The PhytoMAX 4 4S draws 250 watts while producing approximately 531 µmol/s of total PBAR photon output.

That amount of light makes the fixture well suited as a primary light for compact growing areas or as a supplemental fixture within larger cultivation environments.

Its relatively small physical dimensions also make it easier to position precisely where additional intensity is required.

2.5' x 2.5' Vegetative Coverage

For vegetative growth, the PhytoMAX 4 4S is suitable for an approximately 2.5' x 2.5' footprint.

The broader vegetative footprint allows plants to receive the intensity needed for strong structural development while taking advantage of the fixture's compact physical size.

2' x 2' Flowering Coverage

For higher intensity flowering applications, the recommended footprint is approximately 2' x 2'.

Concentrating the 531 µmol/s output over this smaller area provides the stronger canopy intensity required during later growth stages.

Fully Dimmable From 15% to 100%

The PhytoMAX 4 4S supports industry standard 0 to 10V dimming from approximately 15% through 100% output.

This allows one fixture to support plants across different development stages without forcing the grower to run maximum output at all times.

Lower intensity can be used for younger plants or less demanding applications, while output can gradually increase as the canopy develops.

Active LED Cooling

Black Dog LED uses an actively cooled design rather than relying entirely on passive heat sinks.

Maintaining lower diode temperatures helps LEDs operate efficiently and contributes to longer component life, particularly for specialized ultraviolet and violet LEDs.

The PhytoMAX design uses multiple redundant cooling fans. Black Dog LED rates both the fixture and expected fan life at more than 70,000 hours.

The redundant fan design also means the fixture is not dependent upon a single cooling fan for operation.

Compact 15 Inch Fixture

Despite delivering 250 watts of LED power, the PhytoMAX 4 4S measures only 15" x 15" x 4.5".

This compact footprint gives growers considerably more placement flexibility than many large bar style fixtures.

It is particularly useful for smaller grow tents, compact gardens, cabinets, propagation areas, supplemental lighting, tight vertical installations, and spaces where fixture width is limited.

SP and SC Models

The PhytoMAX 4 4S is available in two electrical configurations.

PhytoMAX 4 4SP — The SP model uses a standard IEC style power connection. It supports approximately 100 to 250V and is intended primarily for conventional indoor growing environments. Power cord options include NEMA 5 15 and NEMA 6 15 depending on the selected electrical configuration.

PhytoMAX 4 4SC — The SC model provides expanded electrical and environmental capability. It supports approximately 100 to 277V and uses a locking, water tight power connection. This makes the SC version the preferred option for greenhouse environments or other applications where a more secure environmental power connection is beneficial.

Light output and core spectral performance remain the same between the SP and SC versions.

Wide Voltage Compatibility

Depending on model selection, the PhytoMAX 4 4S can operate across a broad range of electrical systems.

At common voltages, approximate amperage for the 250 watt fixture is:

• 120V: 2.08 amps
• 208V: 1.20 amps
• 230V: 1.09 amps
• 240V: 1.04 amps

The SC configuration extends compatibility to 277V installations.

This flexibility allows the same lighting platform to work in home gardens as well as larger electrical environments.

High Power Factor

The fixture carries a 0.99 power factor, indicating efficient utilization of supplied electrical power.

This becomes increasingly useful when several fixtures are installed together within a larger growing environment.

Designed for Long Service Life

The PhytoMAX 4 4S carries a mean time between failure rating greater than 70,000 hours.

Its expected fan life is also rated above 70,000 hours.

Black Dog LED has been developing LED horticultural lighting since 2010, and the PhytoMAX series reflects years of refinement focused on thermal management, spectral design, reliability, and plant performance.

Designed and Assembled in Colorado

Black Dog LED designs and assembles the PhytoMAX platform in Colorado using premium components selected for demanding horticultural environments.

The fixture also carries multiple safety and electrical certifications, including UL 1598, UL 8800, ETL, CE, FCC, and RoHS.

Power Cord Selection

Choose between a 120V NEMA 5-15 cord or a 240V NEMA 6-15 cord to match your electrical setup. If you are unsure which cord your installation requires, the 120V option is the standard choice for most indoor grow rooms and tents.

What's Included

• Black Dog LED PhytoMAX 4 4S Grow Light
• 8 ft Power Cord
• Hanging Hardware
• Integrated Active Cooling System
• Built In 0 to 10V Dimming
• User Documentation