Boulder Lamp PerfectPar V400W Full Spectrum LED Grow Light

The Boulder Lamp PerfectPar V400W Full Spectrum LED Grow Light is a slim, commercial-grade horticultural fixture engineered primarily for vegetative growth while remaining suitable for other indoor growing applications. Its six-bar architecture combines broad light distribution with a low-profile design, making it especially well suited to vertical farms, multi-tier racks, greenhouses, grow rooms and other controlled-environment facilities.

• Power: 400W Full Spectrum LED
• Output: Over 1,000 µmol/s PPF
• Efficiency: Up to 2.6 µmol/J
• Control: 10–100% Dimming + Controller Ready

Operating at approximately 385–396 watts depending on input voltage, the PerfectPar V400W delivers over 1,000 µmol/s of photosynthetic photon output with efficacy rated up to 2.6 µmol/J. BoulderLamp builds the fixture with Philips/Signify LED drivers and LEDs from Cree, Osram and Samsung.

The fixture also offers considerably more control than a basic fixed-output light. Intensity can be continuously dimmed from 100% down to 10%, while BoulderLamp’s optional programmable lighting controller adds week-by-week scheduling, automated intensity changes, DLI-based lighting strategies and optional pulse-mode operation.

At just 2.2 inches high, the V400W provides a large lighting footprint without consuming excessive vertical space — an important advantage in multi-tier environments where every inch between racks matters.

Optimized for Vegetative Growth

The PerfectPar V400W is specifically designed around the lighting requirements of vegetative plant development. Its full-spectrum output provides a pronounced blue component alongside a broad distribution of photosynthetically active wavelengths.

BoulderLamp specifically rates the fixture for commercial vegetative grows as well as single and multi-tier horticulture in greenhouses, vertical farms and other indoor facilities.

Over 1,000 µmol/s of Photon Output

Despite operating at approximately 400 watts, the PerfectPar V400W delivers over 1,000 µmol/s of photosynthetic photon output.

That makes it especially useful when a facility needs substantial light output without stepping up to the significantly higher electrical load of a larger fixture.

Up to 2.6 µmol/J Efficacy

BoulderLamp’s technical documentation rates the fixture at up to 2.6 µmol/J efficacy, providing a strong combination of photon output and electrical efficiency for commercial horticultural applications.

Six-Bar Light Distribution

Rather than concentrating LEDs into a small central board, the PerfectPar V400W distributes its light sources across a six-bar array measuring approximately 47.2” x 45.4”.

Spreading the LEDs across a nearly four-foot-wide fixture helps distribute photons throughout the growing area, creating a broad, low-profile lighting platform that fits naturally into both single-tier rooms and space-conscious vertical installations.

Full-Spectrum Light

The PerfectPar V400W uses a broad full-spectrum distribution rather than a narrow collection of isolated wavelengths. Its published spectral power distribution shows strong blue output around the 450nm region, a broad band extending through the middle of the visible spectrum and additional output in the red portion of the spectrum.

The resulting spectrum is tailored primarily toward vegetative horticulture while providing a broad range of photosynthetically active light.

Continuous 10–100% Dimming

Not every stage of plant development requires maximum fixture output. The PerfectPar V400W provides a full 10–100% dimming range, letting output be reduced substantially when full intensity is unnecessary.

Growers can match fixture output more closely to plant requirements rather than running the light at maximum power throughout the entire growth period.

Week-by-Week Lighting Control

Pairing the V400W with BoulderLamp’s optional programmable lighting controller expands the fixture into a more advanced automated lighting system. The controller lets the vegetative period be separated into multiple programmed segments, with different light levels assigned week by week.

Depending on the lighting strategy, operators can:

• Automate daily on/off cycles
• Adjust intensity over time
• Divide growth periods into separate lighting segments
• Program different light levels for individual weeks
• Develop DLI-based lighting schedules
• Reduce output when maximum intensity is unnecessary
• Adjust lighting throughout the growth cycle
• Use optional pulse-mode operation

That makes the V400W suitable for facilities looking to move beyond basic timers and manually adjusted fixtures.

Daily Light Integral Management

The compatible BoulderLamp controller can also build lighting schedules around Daily Light Integral (DLI). Rather than treating lighting as a single fixed intensity, growers can adjust both the duration and intensity of light delivered over each day and across successive weeks.

Optional Pulse Mode

The V400W supports optional pulse-mode operation for facilities incorporating more advanced lighting programs.

Multi-Voltage Electrical Compatibility

The PerfectPar V400W supports 120V, 208V, 240V and 277V electrical systems, suiting both smaller installations and commercial facilities. Power consumption varies slightly by voltage:

• 120V: 396W at 3.3A
• 208V: 390W at 1.87A
• 240V: 388W at 1.61A
• 277V: 385W at 1.39A

Choosing a Voltage Configuration

120V — for standard installations running on conventional 120V circuits (up to 4 fixtures per 20A circuit).

208–277V AC — for commercial facilities with higher-voltage electrical infrastructure, supporting more fixtures per circuit at lower current draw.

Daisy-Chain Support for Larger Installations

The V400W is designed with larger lighting installations in mind. BoulderLamp specifies the following maximum number of daisy-chained fixtures per 20A circuit:

• 120V: Up to 4 fixtures
• 208V: Up to 7 fixtures
• 240V: Up to 8 fixtures
• 277V: Up to 10 fixtures

Actual electrical installation should always follow applicable electrical codes, circuit requirements and BoulderLamp installation instructions.

Slim 2.2-Inch Profile

Vertical clearance is especially important in rack-based and multi-tier growing environments. Measuring only 2.2 inches high, the PerfectPar V400W fits a large six-bar lighting surface into spaces where conventional fixtures would consume valuable room between tiers.

Overall dimensions are approximately 47.2” L x 45.4” W x 2.2” H, with a total weight of only 20 pounds.

Premium Lighting Components

BoulderLamp uses established component manufacturers throughout the PerfectPar platform. The V400W incorporates:

• Philips/Signify LED drivers
• Cree LEDs
• Osram LEDs
• Samsung LEDs

Built in Colorado

The PerfectPar V400W is manufactured in Colorado and designed for professional controlled-environment horticultural applications.

Designed for Controlled-Environment Horticulture

Low-profile construction, broad spectral output, dimming and programmable control make the V400W adaptable to several controlled-environment applications, including:

• Vegetative rooms
• Vertical farms
• Multi-tier growing systems
• Greenhouses
• Indoor grow rooms
• Propagation and early-stage production areas
• Commercial horticultural facilities
• Controlled-environment agriculture

What’s Included

• Boulder Lamp PerfectPar V400W LED Grow Light
• Integrated six-bar LED array
• Philips/Signify LED driver system
• Selected voltage configuration

Note: The BoulderLamp programmable lighting controller is sold separately.