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Spider Farmer SF4000 full-spectrum LED grow light with white frame and LEDs.
Spider Farmer LED grow lights in a multi-light daisy chain setup with a central dimming controller for commercial growing.
Spider Farmer SF4000 EVO LED grow light PPFD map in a 4x4 ft tent, showing light intensity at 12, 18, and 22 inches.
Optimized full spectrum LED grow light showing spectrum graph and benefits: 5000K (germination), 3000K (flowering), 660nm (growth), 730nm (yields).
Spider Farmer SF4000 full-spectrum LED grow light with white frame and LEDs.
Spider Farmer LED grow lights in a multi-light daisy chain setup with a central dimming controller for commercial growing.
Spider Farmer SF4000 EVO LED grow light PPFD map in a 4x4 ft tent, showing light intensity at 12, 18, and 22 inches.
Optimized full spectrum LED grow light showing spectrum graph and benefits: 5000K (germination), 3000K (flowering), 660nm (growth), 730nm (yields).
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Spider Farmer SF4000 Dimmable Full Spectrum LED Grow Light

5.0 (7 reviews)
Official Spider Farmer Dealer Model: SF4000
$599.99 CAD$449.99 CAD$599.99 CAD
 $599.99 CAD
starting from 0% interest financing from /mo.

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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
Options:Pay in 6, Pay Monthly
Amount:Up to $1,500 (Pay in 6)
$1,501–$30,000 (Monthly)
Schedule:Bi-weekly / Monthly
Term:6 bi-weekly / 6–60 months
Interest:0% (up to $1,500) / 11.99% APR
Not available in:Quebec
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  • Delivers 1141 μmol/S PPF output to cover a 4x4 ft flowering canopy
  • Samsung LM301H EVO diodes achieve a high 3.14 μmol/J efficiency rating
  • Draws 450 watts and runs silently at 0dB with a fanless design
  • 5-year warranty on manufacturing defects and component failures
  • View More Details

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THROUGH THE Cultivator's LENS Hands-On Evaluation

  • You are upgrading to EVO diodes because your current chips consume too much power for the light quality they provide.
  • You are moving to a 450W platform because your smaller lights leave the edges of your 4x4 canopy underdeveloped.

  • The dimming knob has a tactile click that lets you dial in specific intensity without guessing at a slider.
  • Even at full power the passively cooled heat sink stays cool enough to touch without needing noisy internal fans.
  • We noticed the EVO diodes have a crisp blue tint that keeps plant material tight and compact during the veg stage.

  • Growers who swapped out their old HPS units say they are pulling heavier harvests while cutting their cooling costs.
  • People who use the daisy chain feature say it saved them from running messy extension cords across the grow room.
  • Users running this in tight spaces say the 0dB noise level makes their indoor setup much less noticeable.

Spider Farmer SF4000 Dimmable Full Spectrum LED Grow Light

Scaling up your grow shouldn't mean scaling up your electricity bill. The Spider Farmer SF4000 is built for growers who need serious coverage without the running costs of traditional HPS systems.

Upgraded for 2026, this 450W grow light now runs on premium Bridgelux high-efficiency LEDs — a trusted U.S.-engineered diode brand — with an increased diode count and optimized layout that keeps each LED operating under lower load. The result is improved thermal stability, reduced per-diode stress, and a longer operational lifespan, while maintaining the same output uniformity and 2.7 µmol/J PPE as the previous generation.

Built for both commercial growers and serious hobbyists, the SF4000 covers a 5'×5' vegetation footprint and a 4'×4' flowering footprint — making it one of the most space-efficient options available in its wattage class. The full spectrum output — 3000K, 5000K, 660nm red, and IR 760nm — supports every stage from seedling through harvest in a single fixture, with 660nm red and IR 760nm accelerating flowering, boosting yields, and driving deep canopy penetration for consistent results top to bottom.

An upgraded dimming knob and light switch give you precise intensity control at every growth stage. Multi-light unified dimming makes it straightforward to manage multiple fixtures across larger canopies or commercial rooms. The fanless aluminum heatsink runs at 0dB with no moving parts, and AC100–277V compatibility means it works with any standard outlet worldwide.

Features

Spider Farmer SF4000 2026 daisy chain dimming control
Spider Farmer SF4000 2026 PPFD map canopy uniformity
💡
2026 Bridgelux Upgrade

Premium U.S.-brand Bridgelux diodes with increased count run at lower load for improved thermal stability and longer lifespan.

📈
2.7 µmol/J Efficiency

450W power draw delivers up to 50% energy savings over comparable HPS systems with superior PPF output.

🏭
Commercial Coverage

5'×5' veg and 4'×4' flower footprint maximizes canopy space for serious hobbyists and commercial operations alike.

🔧
Dimming & Switch Control

Built-in dimming knob and light switch with multi-light unified dimming support for large-scale growing environments.

What's Included

  • 1x SF4000 LED Grow Light
  • 2x Stainless Steel Hanger Hook
  • 2x Adjustable Rope Hanger
  • 1x User Manual
  • 1x Power Cord

Specifications

Specification Value
LED Type Bridgelux High-Efficiency LEDs
Power Draw 450W ±5%
Efficacy (PPE) 2.7 µmol/J
PPF Output 1141 µmol/s
Spectrum 3000K, 5000K, 660–665nm Red, 760nm IR
Coverage Veg: 5'×5' / Flower: 4'×4'
Dimensions 648×536×59mm (25.5×21.1×2.3″)
Input Voltage AC100–277V, 50–60Hz
Amperage 3.787A @120V / 1.864A @240V / 1.641A @277V
Noise Level 0dB (Fanless)
Gross Weight 8.77 kg (19.3 lbs)

Spectrum Analysis

The SF4000's full spectrum combines 3000K warm white and 5000K cool white channels with 660–665nm deep red and 760nm IR diodes — covering every photosynthetic window from seedling through late flower. The 660nm red peak drives peak photosynthetic efficiency and accelerates flowering response, while the 760nm IR promotes the Emerson enhancement effect and deeper canopy penetration.

Spider Farmer SF4000 Full Spectrum Output Chart

Warranty

Spider Farmer provides a 5-year warranty on the SF4000 LED grow light, covering manufacturing defects and component failures under normal operating conditions. User error, physical damage, or operator abuse is not covered under warranty terms.

Frequently Asked Questions

What changed in the 2026 SF4000 upgrade?+

The 2026 SF4000 has transitioned from Samsung LM301H diodes to premium Bridgelux high-efficiency LEDs — a trusted U.S.-based diode brand. The upgrade increases total diode count and optimizes the layout so each LED operates under lower load, improving thermal stability and extending the light's overall lifespan. Output, uniformity, and PPE (2.7 µmol/J) remain consistent with the previous generation.

What size grow tent is the SF4000 designed for?+

The SF4000 covers a 5'×5' footprint during vegetation and a 4'×4' footprint during flowering. For best results, pair it with a 4'×4' tent for flower or a 5'×5' tent for veg, along with a compatible 6-inch inline fan for airflow management.

Does the SF4000 support all growth stages?+

Yes. The SF4000's full spectrum output — 3000K, 5000K, 660–665nm red, and IR 760nm — covers every stage from seedling to harvest in a single fixture. The 660nm red and IR 760nm wavelengths are particularly effective during bloom, accelerating flowering time and boosting yields with deep canopy penetration.

How does the dimming function work, and can I connect multiple lights?+

The SF4000 features an upgraded dimming knob and light switch that let you freely adjust intensity at any point during the grow cycle — useful for dialing in your DLI target at each stage. It also supports multi-light unified dimming, so you can connect multiple SF4000 units and control their intensity together from a single point, ideal for commercial rooms and larger tent setups.

How much power does the SF4000 consume, and is it compatible with my outlet?+

The SF4000 draws 450W ±5% and operates on a wide AC100–277V input range, making it compatible with standard Canadian (120V), international (240V), and other outlets worldwide. At 120V it draws 3.787A; at 240V, 1.864A. The efficient Bridgelux design delivers up to 50% energy savings over traditional HPS systems of comparable coverage.

Is the SF4000 noisy? Does it require active cooling?+

No. The SF4000 uses a passive aluminum heatsink with no internal fan, operating at a true 0dB noise level — completely silent with no moving parts to wear out or fail. In hot environments, it's good practice to run a 6-inch grow tent ventilation fan to maintain suitable ambient temperatures for your plants.

What does the 5-year warranty cover?+

Spider Farmer's 5-year warranty covers manufacturing defects and component failures that occur under normal operating conditions — including premature LED degradation and electrical component faults. The warranty does not cover physical damage, user error, or operator abuse. For warranty claims or support, contact Spider Farmer directly through their official support channels.

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