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Spider Farmer SF4000 grow light review

The Spider Farmer SF4000 LED grow light is a solid performer and great value for its specification, especially considering the high quality components such as Meanwell drivers and Samsung LM301b LEDs. It is full spectrum, good efficiency and delivers a good light spread over the 4ft x 4ft or 120cm x 120cm grow space it is designed for.

Spider Farmer SF4000
Spider Farmer SF4000


Spider Farmer have moved on from making 'blurple' LED grow lights with this new SF series of LED grow lights. It is a very welcome change and I am happy to see no more of the noisy box fan LEDs emitting purple light.  The Spider Farmer SF4000 is a 440 watt LED grow light suitable for a 4ft x 4ft (120cm x 120cm) space. It has all the features you would want including:

  • Good Efficiency with Samsung LM301b LEDs
  • High quality LED driver by Meanwell
  • Full spectrum (grow from seed to harvest)
  • Daisy chain control
  • On board dimming from 5% to 100% output

Spider Farmer SF4000 uses Samsung LM301B LEDs

Recommended Coverage: 4ft x 4ft (1.2m x 1.2m)

At 438 watts the SF4000 is specified for a 4ft x 4ft or 1.2m x 1.2m grow area.


The fixture is very high quality in construction, easy to setup and hang and has on board dimming.

Spider Farmer SF4000 layout

LEDs and Spectrum output

The Spider Farmer uses cool white 5000K and warm white 3000K LEDs as well as 660nm reds and far red LEDs to deliver a balanced Full spectrum designed for full cycle growing from seed to harvest

SF4000 spectrum

MIGRO Test results

The power consumed at the wall was 438 watts and the average PAR of 644 µmols/m²/sec in a 4ft x 4ft  (1.2m x 1.2m) grow area means the Spider Farmer SF4000 has a real world system efficiency of 2.06 µmols/watt (usable PPF/watt). A very good result for a grow light in this price range.

Spider Farmer SF4000 PAR chart

Value for money

The Spider Farmer is excellent value for money considering its build quality and performance.

Where to buy

Spider Farmer Shops:

Use discount code for 5% discount: MIGRO

US: Spider Farmer US store

UK: Spider Farmer UK store

Detailed Specifications

Specification SF-4000 new version
Spectrum 660-665nm,3000K,5000K, IR 760nm
PPF 1217umol/s
Coverage Veg:5x5ft      Flower:4x4ft
Lumen 79296Lm±5%@AC120V 79095Lm±5%@AC240V 79395Lm±5%@AC277V
Power draw 456.9W±5%@AC120V 438.2W±5%@AC240V 439.8W±5%@AC277V
Light Size 648*536*59MM
Package Size 723*610*115MM
Gross Weight 8.766KG
DB 0dB
Input Voltage AC100-277V
Amp 3.787A@AC120V 1.864A@AC240V 1.641A@AC277V
Frequency 50-60HZ
LED 1212 pcs


2 thoughts on “Spider Farmer SF4000 grow light review

Mr nice

Spiderfarmer do not use branded parts in their new models they replaced the mean well driver and other parts with cheap unbranded ones. Its a cash grab

September 8, 2022 at 10:44am
Ronald Miller

I would like to put two of the sf4000 on my sun circle.

September 8, 2022 at 10:44am

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