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Spider Farmer SF4000 dimmable full spectrum LED grow light with white and red diodes.
Spider Farmer grow lights daisy-chained with dimmer.
Optimized full-spectrum LED grow light graph showing peaks in blue, green, red, and IR light.
SF4000 EVO PPFD map: Grow light test in a 4x4 tent at 12", 18", and 22" heights, showing light intensity distribution.
Spider Farmer SF4000 dimmable full spectrum LED grow light with white and red diodes.
Spider Farmer grow lights daisy-chained with dimmer.
Optimized full-spectrum LED grow light graph showing peaks in blue, green, red, and IR light.
SF4000 EVO PPFD map: Grow light test in a 4x4 tent at 12

Spider Farmer SF4000 Dimmable Full Spectrum LED Grow Light

5.0 (7 reviews)
Official Spider Farmer Dealer Model: SF4000
$399.99 USD$349.99 USD$399.99 USD
 $399.99 USD
starting from 0% interest financing from /mo.

Payment Options

Options:Pay in Four, Pay Monthly
Amount:Up to $1,500 (Pay in 4)
Up to $10,000 (Monthly)
Schedule:Bi-weekly to Monthly
Term:6 weeks, 12 or 24 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Schedule:Bi-weekly to Monthly
Term:6 weeks, 6 or 12 months
Interest:0% to 35.99% APR*
Credit Check?Soft Check Only
Finance up to:$4,000
Must apply on a desktop device.
Schedule:Flexible
Term:Up to 36 months
Interest:Processing fee + interest
Lease-to-Own?Yes
Amount:$500 to $10,000
Looking to finance equipment under your corporation? Learn more about Business Financing
  • Provides 1141 μmol/S output with 3.14 μmol/J diode efficiency
  • Uses Samsung LM301H EVO diodes for better blue spectrum coverage
  • Draws 450W to cover 5x5 ft vegetative or 4x4 ft flowering areas
  • 5-year warranty on manufacturing defects and component failures
  • View More Details
Order today, ships between June 15 - June 18, 2026

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THROUGH THE Cultivator's LENS Hands-On Evaluation

Who This Is For

  • You are upgrading to EVO diodes because your current lights lack the intensity needed to maximize late stage yields.
  • You are switching to a fanless board because the noise from active cooling fans makes your workspace too loud.
  • You are consolidating multiple small panels into one unit because managing tangled power cords is a constant chore.

What We Found

  • The EVO diodes run cooler than older chips, which helps manage heat in sealed tents or smaller 4x4 spaces.
  • We found the dimming knob has a nice physical click that makes it easy to dial in precise stages of growth.

What Users Say

  • Users who switched from HPS say they stopped fighting high power bills while seeing heavier harvest sets
  • Growers in small spaces report the silent fanless design allows them to run lights at night without any noise

Spider Farmer SF4000 450W Full-Spectrum Dimmable LED Grow Light | High-Efficiency 4x4 Canopy Coverage

The Spider Farmer SF4000 is a 450W full-spectrum LED grow light designed for high-efficiency indoor cultivation in 4x4 or 5x5 foot areas. By utilizing an upgraded array of Bridgelux diodes, this fixture delivers a photosynthetic photon flux (PPF) of 1171 μmol/S while maintaining a fanless, silent thermal profile. It is a technical solution for intermediate growers seeking to maximize crop yield and canopy penetration without the noise or energy overhead of traditional HID systems.

Spider Farmer SF4000 dimmable full spectrum LED grow light with white and red diodes.
450WPower draw
2.7µmol/JPhoton efficiency
4x4ftCore coverage
55,000HRated lifespan

Features

Bridgelux Diode Array

High-performance Bridgelux LEDs provide a full-spectrum output including 3000K, 5000K, 660nm red, and 760nm IR. This combination supports all growth stages from germination through flowering.

Silent Passive Cooling

The thick aluminum heat sink manages thermal loads without internal fans. This design eliminates mechanical noise and prevents dust buildup inside the fixture.

Precision Dimming Control

A dedicated MIN-MAX knob allows for granular intensity adjustments. You can match the light output to the specific requirements of your crop's current growth phase.

Multi-Light Daisy Chain

Integrated CH1 and CH2 ports enable unified dimming for large-scale operations. A single master light can control the intensity of multiple connected units simultaneously.

Compare the SF Series Line

Power Draw
Core Coverage
PPE
Best For
SF300SF300
35±5% @AC120V-240V
2x2.5 ft.
2.3 umol/J
Seedlings and clones.
SF600SF600
75W ±5% @AC120V-240V
2x4 ft.
2.3 µmol/J
Supplemental veg lighting.
SF1000SF1000
100W±5%@AC100V-277V
2x2 ft.
2.5 µmol/J
Small 2x2 personal grows.
SF2000SF2000
200W
2'×4'
2.7 µmol/J
Rectangular 2x4 grow spaces.
Spider Farmer SF4000SF4000You're viewing
450W
4x4 ft.
2.7 µmol/J
Full-cycle 4x4 tent cultivation.
SF7000SF7000
650W ±5% @AC100-277V
5'x5' (150x150cm)
2.8 umol/J
High-intensity 5x5 commercial flowering.

In Detail

Spider Farmer SF4000 dimmable full spectrum LED grow light with white and red diodes.

The SF4000 utilizes a high-density diode layout to ensure uniform light distribution across a 4x4 foot flowering canopy. By avoiding the central hot spots common in lower-tier fixtures, it promotes consistent growth rates from the center to the edges of the tent. The 450W driver is engineered for high-voltage efficiency, reducing the heat footprint while maximizing photon output for deep canopy penetration.

  • 1171 μmol/S total PPF output
  • 2.7 µmol/J photosynthetic photon efficacy
  • 0dB silent operation via fanless aluminum heat sink
  • 5x5 foot maximum coverage area
  • 5-year manufacturer warranty protection

Light Footprint (PPFD, μmol/m²/s)

Hang height Edge Center Edge
Test Environment 3 4 3
12" 1184 1821 1184
18" 891 1371 891
22" 740 1139 740
High
Medium
Low
Edge values estimated

Light Spectrum

5000KPromotes Germination
3000KBoosts Flowering
660nmAccelerates Growth
730nmIncreases Yields

Technical Specifications

PERFORMANCE
PPF1171 μmol/S@AC120V
PPE2.7 µmol/J
Core Coverage4x4 ft.
Max Coverage5x5 ft.
Lifespan55,000 H
ELECTRICAL
Power Draw450W ±5% @AC120-277V
Input VoltageAC100-277V
Frequency50-60HZ
Lighting Control Protocols0-10V
PHYSICAL
Light Size64.8 x 53.6 x 5.0 cm / 25.51 × 21.10 × 1.97 Inch
Net Weight6.38 kg
Gross Weight8.57 kg
Operating Temperature-20-35℃(-4-95℉)
GENERAL
BrandSpider Farmer
Product ModelSF4000
Product SeriesSF Series
LEDBridgelux
Grow Tent Compatible4'x4'
Recommended Fan Size6-Inch
Spectrum660-665nm, 730-740nm, 2800-3000k, 4800-5000k
ModelSF4000

In the Box

  • 1x SF4000 LED Grow Light (with dimmer box)
  • 1x Power Cord
  • 4x YOYO Hanger Hook
  • 1 x User Manual for Installation

Warranty

The SF4000 is covered by a 5-year manufacturer warranty. This coverage includes the official Spider Farmer warranty period for the original purchaser, ensuring long-term reliability for your indoor harvest. Trimleaf is an authorized Spider Farmer retailer; this unit ships with the full manufacturer warranty, valid for the original purchaser.

Owner's Manual

Product Manual

Frequently Asked Questions

Is the SF4000 completely silent during operation?

Yes, the fixture is completely silent because it uses a passive aluminum heat sink rather than active cooling fans. This eliminates the mechanical noise and vibration often associated with high-wattage grow lights.

Can I connect this light to a third-party environmental controller?

The SF4000 supports 0-10V dimming protocols via its daisy-chain ports. While it is compatible with many standard controllers, the GGS controller and specific sensors are not included and must be sourced separately.

What is the actual power draw at the wall?

The unit draws 450W with a variance of plus or minus 5 percent depending on your input voltage. This high efficiency helps keep electricity costs manageable compared to 600W or 1000W HID alternatives.

Does this light provide enough coverage for a 5x5 tent?

The SF4000 provides a maximum coverage area of 5x5 feet for vegetative growth. For high-intensity flowering, we recommend a 4x4 foot core coverage area to ensure optimal canopy penetration.

How do I adjust the light intensity for seedlings?

You can use the integrated dimming knob to lower the intensity to the minimum setting. This allows you to provide gentle light for young plants without needing to raise the fixture to the top of your tent.

Are the LEDs replaceable if one fails?

The Bridgelux diodes are integrated into the board for maximum thermal efficiency and are not designed for individual replacement. However, the unit is backed by a 5-year warranty to protect against manufacturing defects.

Happy To Help

Questions About This Product?

Our specialists are happy to help. Call us or send a message and we'll get back to you within one business day (most of the time within a few hours.)

Call (360) 800-5535

Why Trimleaf

Equipping home growers, craft producers, and commercial operations across North America since 2016.

10+
Years of Specialist Knowledge
4.8★
Over 1,900 Verified Reviews
50,000+
Growers Served
120+
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