- 1x SF4000 2026 LED Grow Light
- 1x Power Cord
- 2x Yoyo Rope Ratchets
- 1x User Manual
Spider Farmer SF4000 EVO Dimmable Full Spectrum LED Grow Light
starting from 0% interest financing from
/mo.
- 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
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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 EVO 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. The warm 3000K and daylight 5000K whites drive balanced vegetative growth, while 660nm red and IR 760nm accelerates flowering, boosts yields, and drives deep canopy penetration for consistent results from the top of the canopy down to the roots.
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.
What's Included
Features
💡
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.
Spider Farmer SF4000 Specifications
| Specification | Value |
|---|---|
| Model | SF-4000 (2026) |
| LED Type | Bridgelux High-Efficiency LEDs |
| Power Draw | 450W ±5% |
| Efficiency (PPE) | 2.7 µmol/J |
| PPF Output | 1141 µmol/s |
| Coverage | Veg: 5'×5' / Flower: 4'×4' |
| Light Size | 648×536×59mm (25.5×21.1×2.3") |
| Input Voltage | AC100–277V |
| Spectrum | 3000K, 5000K, 660–665nm Red, 760nm IR |
| Frequency | 50–60Hz |
| Noise Level | 0dB (Fanless) |
| Gross Weight | 8.77kg (19.3 lbs) |
| Amperage | 3.787A @120V / 1.864A @240V / 1.641A @277V |
Support & Manuals
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 EVO 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 is designed for mid-to-large indoor grows. It 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, and 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 3000K provides warmer, reddish light and the 5000K delivers cooler, blue-leaning output for vegetative growth. 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 North American (120V), European (240V), and international outlets. 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. There are no moving parts to wear out or fail. In hot environments (particularly during summer), it's good practice to run a 6-inch grow tent ventilation fan to maintain suitable ambient temperatures for your plants, but the light itself generates no noise.
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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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.)
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