BoulderLamp Guardian 900W Full Spectrum LED Grow Light with 405nm Crop Protection

The BoulderLamp Guardian 900W Full Spectrum LED Grow Light combines high-output horticultural lighting with integrated 405nm antimicrobial visible-light technology, creating a professional lighting platform designed to support both plant growth and crop protection.

Built in the USA for demanding indoor cultivation, the Guardian900W uses a broad six-bar LED array to distribute full-spectrum light across a coverage area of up to 4’ x 5’. Its primary horticultural spectrum combines premium white and red LEDs from Cree, Osram and Samsung, while dedicated LEDESTAR 405nm LEDs create a separately controlled antimicrobial light channel.

• Power: Up to 900W + 405nm Protection
• Coverage: Up to 4’ x 5’
• Efficiency: 2.7 µmol/J Full Spectrum
• Crop Protection: On-Demand 405nm Visible Light

The result is more than a conventional high-output grow light. BoulderLamp designed the Guardian900W to combine full-spectrum horticultural performance, independent spectral control, programmable lighting and non-UV 405nm crop-protection technology in a single commercial-grade fixture.

With an average full-spectrum PPE of 2.7 µmol/J, maximum PPFD reaching 2,100 µmol/m²/s, independent white and red spectrum control and a commercial 120–277VAC operating range, the Guardian900W is engineered for serious indoor growing environments.

Full-Spectrum Lighting + 405nm Crop Protection

The defining feature of the Guardian900W is its dual-purpose lighting system. The primary horticultural channel provides broad full-spectrum white and red light for plant growth, while a dedicated 405nm violet-blue visible-light channel can be activated on demand.

BoulderLamp developed this 405nm technology as an antimicrobial lighting system designed to help inhibit microorganisms such as mold, powdery mildew, yeast and bacteria without relying on chemical treatments.

Unlike UV sanitation systems, the Guardian’s 405nm technology operates in the visible violet portion of the spectrum rather than ultraviolet light, so antimicrobial lighting cycles can be built directly into the same fixture responsible for normal horticultural lighting.

On-Demand 405nm Antimicrobial Light

Dedicated LEDESTAR 405nm LEDs create the Guardian900W’s antimicrobial light channel. Rather than running continuously as part of the normal horticultural spectrum, the 405nm cycling beam can be operated on demand, letting growers build antimicrobial exposure into a controlled lighting schedule.

BoulderLamp designed the system to help:

• Inhibit mold and powdery mildew
• Suppress bacteria and yeast
• Reduce reliance on chemical crop treatments
• Provide antimicrobial exposure without UV light
• Integrate crop protection directly into the lighting system
• Support use throughout flowering environments

The antimicrobial channel’s output is concentrated around the 405nm violet-blue wavelength, distinctly separate from the fixture’s broad horticultural spectrum.

High-Efficiency Full-Spectrum Output

The Guardian900W’s primary horticultural lighting system is rated at an average 2.7 µmol/J PPE when operating without the antimicrobial cycling beam.

Maximum PPFD reaches approximately 2,100 µmol/m²/s, giving the fixture the intensity demanding high-light cultivation requires. The fixture is especially suited to flowering applications while retaining the full-spectrum output needed for broader indoor horticultural use.

Premium Cree, Osram & Samsung LEDs

BoulderLamp uses established LED manufacturers throughout the Guardian900W’s primary horticultural lighting system. The full-spectrum array incorporates LEDs from:

• Cree
• Osram
• Samsung

The dedicated antimicrobial channel uses LEDESTAR 405nm LEDs, so the horticultural and antimicrobial functions each run on purpose-selected LED systems rather than generating both types of output from the same diode package.

Independent White & Red Spectrum Control

The Guardian900W provides considerably more control than a conventional fixed-spectrum grow light. Its two-channel spectrum control lets the white and red portions of the horticultural spectrum be adjusted independently.

Both channels adjust from 100% down to 10%, letting growers modify overall intensity and spectral balance throughout the growth cycle and build more customized lighting strategies than a single fixed spectrum allows.

Programmable Bluetooth Lighting Control

The Guardian900W is designed to integrate with BoulderLamp’s compatible programmable lighting control system. With the appropriate BoulderLamp controller, growers can manage intensity, schedules, spectral balance and antimicrobial cycling from a connected control platform.

Lighting programs can be adjusted day by day, week by week or across the entire growth cycle — a significant advantage in commercial facilities where manually adjusting individual fixtures becomes impractical.

Up to 4’ x 5’ Coverage

The Guardian900W is designed to provide uniform illumination across a coverage area of up to approximately 4’ x 5’.

Its large physical footprint and six-bar architecture distribute LEDs across much of the target growing area rather than concentrating output into a small central source, creating more consistent photon distribution across rectangular growing areas.

Six-Bar LED Architecture

The six-bar LED configuration spreads output across a large canopy. The fixture measures approximately 47” long x 43” wide x 2.5” high, creating a large light-emitting surface with a remarkably slim profile.

That combination of broad physical coverage and low-profile construction suits both conventional indoor rooms and space-conscious commercial growing configurations.

Designed for Dense Canopies

With maximum PPFD of approximately 2,100 µmol/m²/s, a large six-bar emitting surface and a flowering-oriented spectrum, the Guardian900W is built for high-intensity canopy lighting.

For commercial operators, this provides a combination of intensity and distribution designed around productive flowering environments.

Moisture-Protected LED Boards

Indoor cultivation can expose lighting equipment to elevated humidity over extended operating periods. BoulderLamp applies a Dow Corning silicone conformal coating to the Guardian900W’s LED boards.

The coating helps protect sensitive components from moisture, supporting consistent long-term output in commercial environments where fixtures may run for thousands of hours under elevated humidity.

Commercial 120–277VAC Operation

The Guardian900W supports an operating voltage range of 120–277VAC, covering conventional 120V installations as well as the higher-voltage infrastructure common in commercial cultivation facilities.

Operating at higher voltage also reduces current requirements, making the fixture adaptable to larger multi-light installations when the electrical system is appropriately designed.

Voltage-Specific Power Requirements

Power consumption varies with operating voltage and whether the antimicrobial lighting system is active. Manufacturer specifications list maximum input power of approximately:

• 120V: 900W
• 208V: 885W
• 240V: 880W
• 277V: 875W

Electrical planning should always be based on the voltage and configuration being installed.

Choosing a Voltage Configuration

120V — for standard residential and small-room installations running on conventional 120V circuits.

208–277V AC — for commercial facilities with higher-voltage electrical infrastructure, drawing lower current per fixture.

Non-UV Crop Protection Technology

One of the Guardian900W’s most important distinctions is that its antimicrobial system does not rely on UV light. The dedicated 405nm output sits within the visible violet portion of the spectrum.

For growers who want integrated crop protection without adding a separate UV fixture, this is one of the Guardian900W’s most distinctive capabilities.

Built in the USA

The BoulderLamp Guardian900W is built in the USA and designed around professional cultivation requirements.

Its commercial voltage compatibility, premium LED components, moisture-protected circuit boards, programmable controls and six-bar construction position it as a long-term lighting platform rather than a basic consumer grow light.

What’s Included

• BoulderLamp Guardian900W LED Grow Light
• Integrated Full-Spectrum White & Red LED System
• Integrated 405nm Antimicrobial LED System
• Dimming & Independent Spectrum Control Capability

Note: Compatible BoulderLamp lighting controllers may be required for advanced Bluetooth programming, automated lighting recipes and centralized control. Controller hardware is not included unless specifically selected with the fixture.