10 Best 4×4 Grow Lights of 2026
Ten LED grow lights for 4x4 tents compared, from the MARS HYDRO TS3000 and Spider Farmer SF4000 to AC Infinity IONBOARD and IONFRAME, VIVOSUN, and HLG.
By Ethan Cole
Updated November 2, 2026
A 4×4 tent is the most common size for home growers who want a real harvest of vegetables indoors. It takes about 400 to 600 watts of LED, enough that heat, weight, and hanging height all start to matter.
This guide compares ten 4×4 lights. For bigger tents see 5×5 grow lights; for style comparisons see bar style and quantum board lights.
Safety note: grow tent lights draw from about 65 to 850 watts. Hang them from hangers rated for the fixture’s weight, plug them into a grounded outlet (GFCI-protected in a humid tent), keep drivers and cords off wet floors, and follow the maker’s hanging height. Many of these lights include far-red or infrared (730nm) diodes and a few include UV (395 to 405nm); do not look into them at close range. We describe what each maker lists; we do not promise growth or harvest results.
All Products Compared
| Product | Best For | Power (Listed) | Output or Efficacy (Listed) | Style | Control |
|---|---|---|---|---|---|
| MARS HYDRO TS3000 | Best Overall | 420W | Not listed | Board with reflector | Knob, app with controller |
| Spider Farmer SF4000 | High Efficacy Board | 450W | 2.7 µmol/J system | Board | Dimmer |
| AC Infinity IONBOARD S44 | IP-65 Board | Not listed | Not listed | Board | 0 to 100% |
| AC Infinity IONFRAME EVO6 | Built-In Scheduling | 500W | 3.14 µmol/J (chip) | Bars | Schedules, 10 levels |
| VIVOSUN LumaLight 400W | Value | 400W | Not listed | Board | 4 levels, app via GrowHub |
| VIVOSUN AeroLight 550W | Bars with Fan | 550W | Not listed | Bars | App via GrowHub |
| FARMLITE 360W 4×4 | 0-10V Control | 360W | Not listed | Foldable bars, IP65 | Dimmer, 0-10V |
| HLG 600 Rspec | Premium | 600W | 1,529 µmol/s, 2.60 µmol/J | Board | Knob |
| KOSCHEAL KC3000 | Three Spectrum Modes | 300W title (see note) | 2.9 µmol/J | Panel with fan | Dual knobs |
| Spider Farmer G5000 | Bar Value | 480W | 2.8 µmol/J | Bars | 10 to 100%, daisy chain |
| Award | Product | WikiHomeLED Score About WikiHomeLED ScoreThe WikiHomeLED Score is our own rating from 0 to 10, calculated the same way for every product from Amazon buyer ratings, adjusted for how many ratings each product has. It is never influenced by manufacturers, retailers, or affiliate commissions. Learn more › | Price | |
|---|---|---|---|---|
| Best Value |
MARS HYDRO 420W TS3000 Led Grow Lights for Indoor
|
8.7/10 | $269.99 | Buy |
| Best Overall |
Spider Farmer SF4000 LED Grow Lights for Indoor
|
8.7/10 | $259.99 | Buy |
AC Infinity IONBOARD S44
|
8.4/10 | $369.00 | Buy | |
AC Infinity IONFRAME EVO6
|
8.3/10 | $579.00 | Buy | |
| Best Budget |
VIVOSUN LumaLight 400W LED Grow Light
|
8.7/10 | $259.99 | Buy |
VIVOSUN AeroLight 550W LED Grow Light
|
8.2/10 | $499.99 | Buy | |
360W LED Grow Lights 4x4 Growing Bar for Indoor
|
8.2/10 | $179.99 | Buy | |
| Best Premium |
HLG 600 Rspec FR 600W 120V LED Quantum Board Grow
|
8.5/10 | $559.95 | Buy |
KOSCHEAL KC3000 300W LED Grow Light, 3 Modes
|
8.2/10 | $109.77 | Buy | |
Spider Farmer G5000 LED Grow Light
|
8.2/10 | $299.99 | Buy |
MARS HYDRO 420W TS3000 Led Grow Lights for Indoor
Spider Farmer SF4000 LED Grow Lights for Indoor
AC Infinity IONBOARD S44
AC Infinity IONFRAME EVO6
VIVOSUN LumaLight 400W LED Grow Light
VIVOSUN AeroLight 550W LED Grow Light
360W LED Grow Lights 4x4 Growing Bar for Indoor
HLG 600 Rspec FR 600W 120V LED Quantum Board Grow
KOSCHEAL KC3000 300W LED Grow Light, 3 Modes
Spider Farmer G5000 LED Grow Light
Top 3 4×4 Grow Lights Reviewed
#1 MARS HYDRO TS3000: Best Overall
Why We Picked It
The TS3000 is the 4×4 member of Mars Hydro’s TS series, which has the largest rating base of any tent light we found: 4.6 stars on about 20,400 ratings, pooled across sizes. It draws 420 watts and is rated for 4 x 4 ft flowering and 5 x 5 ft vegetative coverage.
The dimmer box has a manual knob and a smart mode that connects to Mars Hydro’s iConnectu, iHub, or iControl controllers (sold separately) for app schedules and sunrise and sunset dimming.
Key Specifications
- Power: 420W
- Coverage: 4×4 ft flower, 5×5 ft veg
- Spectrum: 3200 to 4200K, 5200 to 6800K, 730 to 740nm
- Size and weight: 26.5 x 21.9 in, 11.3 lb
- Dimming: knob plus smart mode
- Reflector: 120-degree white
| Pros | Cons |
|---|---|
|
|
Things to Consider
At 11.3 lb it is light for a 4×4 fixture, which makes hanging easier than with bar lights.
Best For
A 4×4 tent of vegetables and herbs.
Skip It If
Skip it if you want published efficacy or built-in app control.
Check current pricing and availability for the MARS HYDRO TS3000.
#2 Spider Farmer SF4000: High Efficacy Board
Why We Picked It
Spider Farmer’s SF4000 draws 450 watts at a listed 2.7 µmol/J system efficacy, fanless, for 4×4 tents. It shares the SF series rating of 4.6 stars on about 12,400 ratings and the 5-year warranty.
The spectrum is 3000K and 5000K white, 660nm red, and 760nm IR. At 25.39 x 21.1 inches and 14 lb it is a board, not a bar light.
Key Specifications
- Power: 450W
- Efficacy: 2.7 µmol/J system (listed)
- Spectrum: 3000K, 5000K, 660nm, 760nm
- Size and weight: 25.39 x 21.1 in, 14 lb
- Cooling: fanless
- Warranty: 5 years
| Pros | Cons |
|---|---|
|
|
Things to Consider
More SF and SE models are compared in Spider Farmer grow lights.
Best For
4×4 tents where efficiency and warranty matter.
Skip It If
Skip it if you want even edge coverage from bars.
Check current pricing and availability for the Spider Farmer SF4000.
#3 AC Infinity IONBOARD S44: IP-65 Board
Why We Picked It
The IONBOARD S44 uses Samsung LM301H diodes on a unibody aluminum board rated IP-65 for humid tents. It dims from 0 to 100 percent and connects to AC Infinity controllers for grow cycles, scheduling, and app control. IONBOARD lights score 4.5 stars on about 1,050 ratings, pooled across sizes.
AC Infinity does not list wattage on this listing; compare the spec sheet in the images if you need it.
Key Specifications
- Diodes: Samsung LM301H
- Board: unibody aluminum
- Moisture: IP-65
- Dimming: 0 to 100%
- Smart control: with AC Infinity controllers
- Size: 26 x 26 in (listed)
| Pros | Cons |
|---|---|
|
|
Things to Consider
If you use AC Infinity fans and controllers already, this board joins the same system.
Best For
Humid 4×4 tents and AC Infinity setups.
Skip It If
Skip it if you want published wattage and output on the listing.
Check current pricing and availability for the AC Infinity IONBOARD S44.
How to Choose a 4×4 Grow Light
Watts and Coverage
400 to 600 watts of real power covers a 4×4. Lights listed for 5×5 veg and 4×4 flower are a good match.
Weight and Hanging
The 4×4 fixtures here that list a weight run from 11.3 to 14 lb, and bar lights are often heavier. Use the tent’s crossbars and rated hangers.
Heat
At 400 watts and up, plan an exhaust fan sized for the tent. External or removable drivers help.
How We Evaluate 4×4 Grow Lights
We did not grow plants under these lights. We compared manufacturer specifications and Amazon listing details, and ranked products by the WikiHomeLED Score, which adjusts the Amazon star rating for the number of ratings (ratings checked November 2, 2026). To qualify, a product had to be an LED grow light sold for 4×4 ft tents, with at least 20 ratings and a rating of 4.1 stars or higher. PPF, PPFD, efficacy (µmol/J), and coverage figures are as published by each seller and are not our measurements. Sellers often list a larger vegetative coverage and a smaller flowering coverage; we quote both where given. Several listings make yield claims; we do not repeat them. Mars Hydro TS, Spider Farmer SF, VIVOSUN LumaLight, VIPARSPECTRA P, and AC Infinity IONBOARD ratings are pooled across every size on one Amazon listing family, so the same rating can appear for different sizes. The full method is on our How We Review page. Brands are capped at two entries.
Frequently Asked Questions
How many watts for a 4×4 grow tent?
About 400 to 600 watts of real LED power. The lights here list 300 to 600 watts.
Board or bar light for a 4×4?
Bars spread light more evenly to the corners and run cooler; boards cost less and weigh less.
Is one light enough for a 4×4?
Yes, every light here is sold as a single fixture for a 4×4.
How high should a 4×4 light hang?
Follow the maker. HLG recommends 28 to 36 inches for the 600 Rspec at full power.
Final Verdict
The MARS HYDRO TS3000 is the 4×4 light with the most rating history and a light, easy-to-hang build. Spider Farmer’s SF4000 adds published efficacy and a 5-year warranty, and AC Infinity’s IONBOARD S44 is the sealed choice for humid tents. For bars with built-in scheduling, see the IONFRAME EVO6.
About the author
Ethan Cole leads research and editing at WikiHomeLED, comparing LED lighting for the home through manufacturer specs, manuals, safety listings and owner feedback. Every product is scored against the criteria on our How We Review page, and picks are updated when models change.