* Disclaimer: OveReview is reader-supported. We earn commissions from qualifying purchases
SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs

SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs

SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs
$ 539.99

Score By Feature

Based on 2,768 ratings
Brightness
9.18
Easy to use
9.38
Light weight
9.29
Value for money
8.98
Heat output
8.18
Timer function
6.86

OveReview Final Score

How Our Score Is Calculated

Product Description

The latest LED High Yielding technology from Samsung LM301B diodes assures lower running costs and higher yields with SPIDER FARMER LED Grow Lights. The LEDs are more energy-efficient, with the highest yield from Samsung LM301B diodes. Light output of 7 umol/J helps uniform canopy penetration to raise yields by maximum amounts resulting from powerful light output. Consumes only 450w, which makes it 50% more efficient than HPS or other SMD LEDs or Blurple lights. The Veg area is 6 feet by 6 feet, and Flowering area is 5 feet by 5 feet.
DIMMING KNOB AND LIGHT SWITCH SF series grow lights have a dimming knob and light switch for instant dimming. Whenever a light is dimmed or brightened, the intensity can be changed at will. Connecting multiple lights and controlling the dimmers at once makes it especially useful for large indoor growing areas
This product is suitable for all growth stages, because it offers excellent white, blue, red, and infrared (5000K, 3000K, 660nm, and 760nm infrared). Diodes in the 3000K and 5000K ranges produce more reddish light, and diodes in the 6300K range produce more blue light. It is particularly effective during bloom, when it will speed up flowering time and increase yield to increase revenue. Create your own seed supply by using your own seeds. Away from artificial light, it appears pretty natural, making it a good option for
CONSTRUCTION STRONG and EASY TO USE, No Fan Noise. The performance of MEAN WELL drivers is high, water resistance is average. The updated aluminum board is thick and durable, doesn't generate a lot of heat, has high-quality protective covers for the cables, and is packaged for simplicity. You save money by using high-quality components, as well as your light will last longer.
The LED Plant Lights produced by Spider Farmer are often copied, but will never match our quality and commitment. We provide Free 3 Year After Sales Service through our local service center (US/CA/UK/DE). When it comes to purchasing grow lights, make sure you purchase Spider Farmer products. These lights will give you everything you need from a high-quality lamp - at an affordable price. Feel free to e-mail us if you have any questions, and we will be happy to assist you. All our quality is backed by our ironclad guarantee!

Questions & Answers

Do you want to cut the plug? Do you really mean that?

With the SF4000, you are able to work at 100V or less There is no need to change the plug and power cord, as long as you have a plug adapter available, you can convert the 277V

What about 240? Can it run these?

In short, yes. It will switch from a 110-volt to a 240-volt power supply.

The number 2000?

If you are using 240V, it will draw about 2 amps. If you are using 120 volts, you will need about 4 amps

Selected User Reviews For SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs

For a period of time, production was suspended temporarily to fix the issue, but it has since been back up and running
5/5

I have no idea why it is taking so long.

Byron Bartlett
Byron Bartlett
| Jun 27, 2021
The light is awesome and the results are excellent
5/5

I look for a board that offers a nice quantum experience at a fair price, and the SF4000 fits this description perfectly. It's nothing short of impressive right out of the box, and it's only the beginning. This light has built-in reds and blues for flowering, and yet it is a bright white full spectrum light, with no blurring. For indoor gardeners of any skill level, this is a fantastic light.

Ellison Lindsay
Ellison Lindsay
| Sep 16, 2020
In a 4x8 for under $1200 delivered, genuine Samsung diodes are growing a killer medical KB
5/5

So far, it has been just as effective as my single ended 1000w MH for vegetative growth. There is no need to pay so much for HLG. It's so easy to order direct and save hundreds of dollars. I checked out the 450W lights, and they are indeed very nice! A friend of mine had a small medical garden that produced very high quality medicine. Notill beds that contain 91grams of energy per watt. A special strain called Pineapple Dreamwreck was selected from the following strains Blackberry Kush, GG4, 501st OG, and GG4.

Chelsea Abbott
Chelsea Abbott
| Dec 09, 2020
I just bought my second item! The second time I have participated in this event The lights are exactly as the seller stated! I play around a bit with plant genetics and they work great! I have found these to be very well made and do cover the 5x5 area as claimed
5/5

A great heat dissipation system.

My plants really seem to enjoy this light, they are yielding more. During the limited time I have studied this light, I seem to have answered questions incorrectly due to lack of study. If you have questions regarding why the light works as it does, please do not hesitate to reach out to me. I have inserted my own gene edits into the plant. Here is a picture of it in week 3 of flower. A grow's need for these lights cannot be overstated.

Kyla Simpson
Kyla Simpson
| Mar 22, 2021
Bright light, well built, super light weight, and delivery in very discreet packaging that's perfectly safe for the fixture to be protected
5/5

This light is bright as F, very well built, and comes in very discreet packaging that's perfectly safe for the fixture to be protected. Using a dimmer switch with the light was not a problem. I contacted the company within 30 minutes about using a dimmer switch with the light, and they responded in a timely manner! As for this light, it generates some heat compared to many of my other lights, though its lack of built in heat sinks or fans is to be expected. Due to its SILENCE, this light can be used in any environment. Wednesday I'll update on how it grows, and might put it in a flower room to see if it compares with my other LED. I currently use KIND K5 lights and KIND veg bars in my rooms, and in comparison this fixture costs a third as much.

Everly Donahue
Everly Donahue
| Aug 30, 2020
THE SPIDER FARMER SF4000 IS BRILLIANT in every way! The following nbsp Before ordering this grow light, I had searched all the grow lights currently available on the market before deciding on Spider Farmer and had written to them many times before ordering one
5/5

I received answers back to every email I sent to Spider Farmer in less than 24 hours, which was very encouraging. Light arrived right on time in a box with no labeling and came in a brown box. If you are going to store your light away for safety reasons, keep the box, because it is a snug custom fit. If you decide to store the light away, it will keep your light safe and sound. THE SPIDDER FARMER SF4000 GROW LIGHT IS AMAZING! It is made of top-quality components which mean that there are no sharp edges or rough spots on this product. And the light itself is shining brightly! After opening my new Spider Farmer grow light and hanging it in my grow tent, I was amazed with how fast it went together! My "unboxing video" is posted in this review so that you can see exactly what is in the box and how simple it is to get a Spider Farmer grow light on your garden wall. Having purchased from here so far, I could not be happier! Seeds will be planted this week and I will update this review as soon as possible.

Rylan White
Rylan White
| Dec 02, 2020
There is no doubt this light will change the game for you! In my growth, a good friend of mine sat me down with the fact that I was growing too fast
5/5

I told him my lights were terrible. As I approached the end of my research after just purchasing my lights, I had gotten used to that fact. The light I chose is the result of extensive research. I don't think it is the cheapest nor the most expensive on the market either. The results are however extraordinary, and the evidence speaks for itself. I am pretty sure I leaned over and gave a high five to one of my plants as soon as I got the light installed and turned on )
Even though I've only had this light for less than a week, the impact it has had is profound. Currently, I am looking for a second one to purchase It is also worth mentioning that I had to work with their customer service as well. I didn't have any issues with the light, but I did have a separate problem with the Despite the time difference, Sunny reached out to me shortly thereafter and resolved my issue. His email also felt There is no doubt that I will be returning to Spider Farm in the future. These days, it is becoming increasingly difficult to match a great product with a great customer service. It has been a pleasure dealing with you, Sunny, and Spider Farms.

Mila Winters
Mila Winters
| Aug 24, 2020
I love the way the lights work
5/5
Aliana Brown
Aliana Brown
| Nov 12, 2020

Related Products For SPIDER FARMER SF-4000 LED Grow Light 5'x5' Coverage Compatible with Samsung LM301B Diodes Dimmable Commercial Grow Lights for Indoor Plants Full Spectrum 3000K 5000K 660nm 760nm IR 1212pcs LEDs