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Spider Farmer SF4000 LED Grow Light

Spider Farmer SF4000 LED Grow Light

Regular price £399.00 GBP
Regular price Sale price £399.00 GBP
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Spider Farmer SF4000 LED Grow Light

The Spider Farmer SF4000 is a market leading LED Grow Light. Next level performance & as stealthy as a ninja. With 1212 Samsung Diodes and Full Spectrum + IR output, The Spider Farmer SF4000 LED Grow Light is the best your plants can get.  


  • Top Quality Samsung & Osram Diodes
  • Free Next Day UK Delivery
  • Waterproof Board
  • Full Spectrum LED Grow Light
  • Harvest 800g Per Flowering Cycle
  • New 2024 Version
  • Super Stealthy
  • Massively Reduced Electricity Costs
  • Fully Dimmable
  • IR Diodes for Improved Flower Density
  • Daisy Chain Ready
  • Zero Noise
  • 450w Power Output
  • New Improved Diode Layout
  • 50000 Hours Life
  • Pay As You Grow With Clearpay
  • Daily Electricity Cost £1.22 


Powerful & Versatile

Introducing the powerful and versatile Spider Farmer SF4000 LED Grow Light, a top-of-the-line solution for all your indoor cultivation needs.

Unboxing the Spider Farmer SF4000 LED Grow Light immediately reveals its high-quality construction and impressive features. The 2023 upgraded version of the Spider Farmer SF4000 LED Grow Light boasts a new and improved diode layout, ensuring precise and even distribution of luminescence over a wide footprint. Say goodbye to hot spots and weak plants in tent corners while maximising lumens and energy efficiency.


Dimmable Driver. Unwavering Reliability

At the core of the Spider Farmer SF4000 LED Grow Light is a 450W dimmable driver that powers an array of 1212 Samsung and Osram diodes with unwavering reliability. The driver has been updated to a 2023 version, offering enhanced electricity efficiency and a significantly longer lifespan compared to other brands.


Huge Output. Tiny Electricity Costs

In spite of its huge light output, the Spider Farmer SF4000 LED Grow Light consumes just a trickle of electricity from the wall yet has been known to outperform 700w of old style HPS light in side by side tests. With an average daily electricity cost of around £1.25, the Spider Farmer SF4000 enables LED Grow Light cultivators to complete an 8 week grow cycle at a cost of around £70.   

This means no more stupid electricity bills, no more wasted energy and definitely no more disappointing yields. This very impressive LED Grow Light from the experts at Spider Farmer is more than capable of producing a massive 2.0g of premium quality herbs for every watt of light consumed. With its whopping 450w output of high intensity full spectrum output, even beginner growers can produce around 900g of flavour rich botanical herbs every single flowing cycle. 


Premium Materials. Built To Last.

Close inspection of the Spider Farmer SF4000 LED Grow Light reveals its premium materials and robust build quality. This LED Grow Light is designed to last, utilising top-quality diodes from industry experts Samsung and Osram. The diodes are even equipped with a protective coating, making them waterproof to an IP65 level. These details contribute to making the Spider Farmer SF4000 one of the best LED Grow Lights available today.

The incredible energy efficiency of the Spider Farmer SF4000 LED Grow Light allows it to pay for itself quickly. With a massive array of super bright LEDs, it achieves an astonishing 2.7umol/j over its output. This level of performance rivals fixtures that cost twice as much, providing exceptional value for your investment.


Lightweight. Cool Operating.

Weighing just under 10 kilograms, the Spider Farmer SF4000 LED Grow Light is sturdy and well-balanced, ensuring it won't buckle or destabilise your grow tent. Its well-designed aluminium body efficiently disperses heat, utilising passive convection to vent excess heat upwards and away from your plants. This fanless, self-cooling system ensures the fixture's longevity and durability.

The Spider Farmer SF4000 LED Grow Light comes equipped with a high-quality dimmer, offering full control to the cultivator. This level of precision makes it suitable for the entire grow cycle, from seedlings to botanical dripping, fragrant flowers. The dimmable feature also enhances power efficiency, allowing growers to provide their plants with precisely the right amount of light at any stage.


Fully Dimmable. Daisy Chain Ready.

The Spider Farmer SF4000 LED Grow Light operates silently and has a low profile, making it perfect for hydroponic and indoor cultivators who value stealth and secrecy. It is fully Daisy Chain ready, with an onboard control box that enables you to connect up to 30 fixtures, using the first one inline as a master controller. This flexibility makes it easy to expand your grow room without the need for extra equipment or control panels.

Spider Farmer stands behind the SF4000 LED Grow Light with a 3-year manufacturer's guarantee, providing ultimate peace of mind for your investment.

When you order the Spider Farmer SF4000 from us, it will arrive in 100% discreet  packaging, with a high-quality hanging kit included. No noisy ballasts or messy cables to deal with – this special LED Grow Light from the pioneers at Spider Farmer is ready to use within minutes, allowing you to upgrade your grow game quickly and easily. 

Spider Farmer SF4000 LED Grow Light Technical Specifications



Input Voltage

AC 220-240V



HPS Equivalent 700w

Veg Footprint

1.5m x 1.5m 

Flower Footprint 1.2m x 1.2m


Samsung lm301b, Osram

Reds & IR 

Diode Count 1212


65cm x 54cm x 6cm


660nm, 3000K, 5000K 

IR 760nm


2.7 umols/j

PAR Value 1156 umol/s
Daily Electricity Costs £1.22

    Product includes:

    • Spider Farmer SF4000 LED Grow light
    • Power Cord
    • User Manual
    • Wire Hangers
    • Ratchet Hangers

    Approximate costs of use based on 75% power for a 12 / 12 flowering cycle. 

    *Calculated using the UK: Energy Price Guarantee (October 2022) electricity rate of 34.00 pence per kWh.
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