Spider Farmer SF-4000 LED Grow Light Review

Spider Farmer SF-4000 LED Grow Light Review

A globally accessible brand, Spider Farmer has proven themselves to be a competitive player in the grow light market. Their SF-4000 model is designed to support your plant’s growth through all stages and is great for commercial use or large spaces. As a budget brand, you might have concerns before making a purchase. That’s where this Spider Farmer SF-4000 review comes in. Learn about the brand, the product specifications, how to hang the light and more so you can be informed before taking the plunge on buying. 

About The Spider Farmer Brand

Spider Farmer is a Chinese brand founded in 2009 and has headquarters in Alhambra, California. They also have warehouses on multiple continents so they can quickly deliver products to customers. Through an official partnership with Samsung, the brand uses top-of-the-line diodes that help ensure their products offer the best lighting available. They also use aluminum for their LED grow light boards

Spider Farmer SF-4000 Product Information

The SF-4000 is a high-power model suitable for wide spaces, indoor farms, and commercial use. The design has zero noise emission, is water-resistant, and has a large area with a solid aluminum heat sink. This grow light also features four light boards, including 1152 1152 Samsung LM301B LEDs, 56 deep red LEDs, and four IR diodes. The lights are highly efficient and cost-effective with the increased yield production. 

There is a dimmable knob feature that lets you adjust the light for every plant’s growth stage, from germination to bloom. You can also benefit from the high-quality LED driver by Meanwell – a well-known brand in its own right. The SF-4000  package comes with two stainless steel hanger hooks, a user manual, power cords of 2 meters each, and two adjustable rope hangers. 


  • High-quality Samsung diodes 
  • High quality LED driver by Meanwell
  • High light output and crop efficiency 
  • Quiet when operating 
  • Waterproof and electric shockproof
  • ETL certified light and UL certified power cord 
  • 50% longer lifespan than other products on the market 


  • Red lights can start to dim after a few months
  • Sensitive diodes
  • Must wear eye protection during operation

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PAR Value and Consumption

The SF-500 uses 5000K cool white and 3000K warm white LEDs as well as 660nm red LEDs for a full balanced spectrum. The power consumption at 438 watts in a 4 x 4 feet grow area also averaged a PAR of 644 µmols/m²/sec. This means the light has an efficiency of 2.06 µmols/watt. For it’s price range, these MIGRO test results are pretty good. 

Warranty Information

Your SF-4000 led grow light comes with a 5-year limited warranty. You can also return or replace your purchase for free within 30 days of delivery in the precondition of non-artificial damage. The warranty covers the following after the 30 days:

  • Up to 30 days: in cases of non-artificial damage, replacements and returns are free 
  • 3 months to 1 year: free repairs, accessories, and services. Return or replacements are only available with quality problems. 
  • 1 year to 5 years: free accessories but buyers must pay the two shipping costs and maintenance fee

Specifications Overview

  • Dimensions | 25.3 x 21.1 x 2.3 inches
  • Weight | 11.5 pounds
  • Actual Watts | 450 watts
  • HID Equiv | 700 watts
  • Veg Coverage | 5 x 5 feet
  • Flower Coverage | 4 x 4 feet
  • Bloom PAR | 1217 umol/s
  • Power draw | 456.9W±5% @AC120V, 438.2W±5% @AC240V, 439.8W±5% @AC277V
  • Amp | 3.787A @AC120V, 1.864A @AC240V, 1.641A @AC277V
  • Frequency | 50-60HZ

Setting Up Your Spider Farmer SF-4000 Grow Light

The SF-4000 is ready to function right out of the box. You don’t need any assembly to plug and operate it for your growing activities. It also has daisy-chain capabilities so you can connect up to 12 lights in one grow space. The dimmable feature can also control all the connected lights with one main light switch control. To ensure you hang your light at the right height and use the correct dimming features for your plant’s growth stage, below are the recommended setup specifications. 


  • Dimmer percent | 50%
  • Height | 24-30 inches above canopy
  • Lighting Schedule | 18 hours on, 6 hours off


  • Dimmer percent | 50-75%
  • Height | 24 inches above canopy
  • Lighting Schedule | 18 hours on, 6 hours off


  • Dimmer percent | 75-90%
  • Height | 18-24 inches above canopy
  • Lighting Schedule | 18 hours on, 6 hours off


  • Dimmer percent | 90-100%
  • Height | 12-18 inches above canopy
  • Lighting Schedule | 12 hours on, 12 hours off

Recommended Add Ons

With no fan that offers zero-noise emissions, most people purchase the SF-4000 with additional ventilation kits. This includes an inline duct fan with a temperature humidity controller and carbon filter. If growing indoors, the light can fit in a 8 x 4 6.5 feet grow tent or 8 x 8 x 6.5 feet grow tent. Additionally, you’ll want to get some protective glasses when operating the SF-4000 since the lights are so bright. 

Spider Farmer SF-4000 Review: Conclusion 

Spider Farmer is a great brand to purchase from, especially considering their diodes’ quality, attention to detail, and positive customer reviews. You’ll get advantageous features, such as multi-light control with the dimmable feature, water resistance, and certifications for a reasonable price that won’t break your wallet. So, if you’re looking for a grow light that is powerful and efficient enough for commercial use, consider purchasing the SF-4000. 

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About the author

George Mouratidis works as a full-time copywriter and journalist. He is the founder of WeedCopywriter.com, a bespoke content writing agency for the cannabis industry. George is a regular editor for many industry publications, as well as corporate blogs. He is also the co-writer of the book Ganja Hustle; a hit cannabis growing guide for the USA and Canada markets. When he is not writing, George likes to work out, trying new foods and playing with his cat. Currently, he lives in Greece.