Recommendations on the best grow lights are made by Justin Sund & the Leafly Picks team after extensive research, internal debate, and years of home growing experience. If you buy through links on this page, we may earn a small commission.
If your plants could talk, they’d ask for better lighting. Indoor growers in 2025 are spoiled with efficient, truly affordable LEDs that can crank out big yields without frying your power bill. We sifted through the blurple, the bloat, and the budget bangers to find the best grow lights for beginners and big harvest dreamers alike. Here’s what’s actually worth plugging in.
A quick look at the best grow lights of 2025
Best grow light for 2×2 tents: HLG 100 Rspec V2
Best grow light for 3×3 tents: AC Infinity IONBOARD S33
Best grow light for big yields: Spider Farmer G8600
Best grow light for autoflowers: Mars Hydro FC4800-EVO
Best overall grow light: HLG Tomahawk 720
| Category | Product | True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|---|---|
| Best grow light for 2×2 tents | HLG 100 Rspec V2 | 95W | 2.55 µmol/J | 2×2, 3×3 | 3 years | $149.00 |
| Best grow light for 3×3 tents | AC Infinity IONBOARD S33 | 240W | 2.7 µmol/J | 3×3, 4×4 | 2 years | $269.00 |
| Best grow light for big yields | Spider Farmer G8600 | 860W | 2.85 µmol/J | 4×4, 5×5 | 5 years | $489.99 ( |
| Best grow light for autoflowers | Mars Hydro FC4800-EVO | 480W | 2.85 µmol/J | 4×4, 5×5 | 5 years | $374.99 ( |
| Best overall grow light | HLG Tomahawk 720 | 720W | 2.87 µmol/J | 5×5, 6×6 | 5 years | $999.00 |
Buying a light for your grow
Buying a grow light in 2025 feels like buying an e-bike, a laptop, or instant ramen in an H Mart. There’s a dizzying number of options, the “specs” get weirdly technical, and everything looks kinda the same, all while the price tags for seemingly similar products fluctuate WILDLY. And if you’re growing weed indoors, whether it’s your first autoflower in a closet or a dialed-in 4×4 with a carbon filter that sounds like a never-ending rip off of a 4-foot bong, your light is the single most important decision you’ll make. No joke. And no pressure y’all.
The good news? LED tech has come a long way. Like, a long way. Today’s best grow lights are more efficient, run cooler, last longer, and use a fraction of the power of an old-school HPS setup. (I do miss, though, feeling like an honest-to-god Sun was living in my closet. RIP HPS). And nowadays, many (most, maybe?) are built for tents and tuned for full-spectrum growth, to give your gals exactly what they’ll need from sprout to finish.
What to consider when comparing grow lights
We sifted through hundreds of top-selling, highly rated, and actually-tested and reviewed lights to find the best of the best. We looked at true wattage (ignore fake “1000W” labels), photon efficiency (tl;dr you want ≥2.5 µmol/J), spectrum quality (look for full-spectrum white + red + far-red), build quality, warranty, price, and where the light’s actually assembled (if you care).
Whether you’re just dipping your green toe into tent life, scaling up your canopy, or trying to keep your autos from stretching like Pedro Pascal’s Mr. Fantastic (meow), we’ve got you covered. Below, you’ll find our top picks for:
- Best for 2×2 tents
- Best for 3×3 tents
- Best for big yields
- Best budget light
- Best light for auto-flower plants
- Best overall grow light
So let there be light! Then we can actually grow something worth trimming.
A quick note about “efficiency”
I mean, what does “efficiency” mean, anyway?
Efficiency in grow lights is measured in µmol/J (micromoles per joule). That’s how many useful plant photons your light spits out for every watt of electricity it eats. The higher the number, the more bang you get for your power bill.
Anything over 2.5 µmol/J is considered elite territory, so more buds, less waste, and a cooler tent (literally).
The best grow lights of 2025: Reviews and recommended products
Best grow light for 2×2 tents: HLG 100 Rspec V2
| • Built for tiny tents and tidy grows |
| • Super efficient, passively cooled |
| • Brand favorite for home growers |
| True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|
| 95W | 2.55 µmol/J | 2×2, 3×3 | 3 years | $149.00 |
HLG 100 Rspec V2
If you’re running a small tent, you don’t need to (and please don’t) overdo it. You just need smart, reliable photons. The HLG 100 Rspec V2 delivers high-efficiency, full-spectrum light tuned for those photosynthetic sweet spots, all in a no-nonsense, ultra-quiet board. It’s ideal for 1 to 2 plants from seedling through flower and fits <chef’s kiss> in a 2×2 space. Plus, it’s assembled and shipped in the USA. No fans. No frills. Just pure, punchy performance. If I could go back and buy my first 2×2 light again, this HLG would be it.
More about HLG
Horticulture Lighting Group helped pioneer the quantum board revolution (spread-out diodes to reduce hotspots and the need for fans), and they’ve earned their reputation as a go-to brand for serious home growers. Their lights are assembled in Tennessee, their efficiency ratings are independently tested (and tight), and their Reddit cred is unmatched.
| Pros | Cons |
|---|---|
| Extremely efficient and low-heat, for the price | No onboard dimmer (but can be wired manually) |
| Plug-and-play setup, great for beginners | Not ideal for more than 2 plants |
| Silent and sturdy (no moving parts) |
Honorable mention
Mars Hydro TS 1000 | $88 ($110) | ~2.6 µmol/J
Dimmable, full spectrum, daisy-chainable, and great value.
Best grow light for 3×3 tents: AC Infinity IONBOARD S33
| • Great spectrum with a clean, modern build |
| • Intuitive smart controller support |
| • Ideal for autoflowers and 2-4 plant grows |
| True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|
| 240W | 2.7 µmol/J | 3×3, 4×4 | 2 years | $269.00 |
AC Infinity IONBOARD S33
This light delivers pro-level output in a compact, beginner-friendly form. AC Infinity nailed the balance between power and usability here, with Samsung LM301H diodes and excellent passive cooling. The S33 thrives in 3×3 tents and pairs with their UIS controller system, letting you automate photoperiod schedules, if you rock like that.
More about AC Infinity
AC Infinity is best known for their fans (not fans “rah rah”, but fans “brrr brrr”). To be fair, they’re really good fans. And over the past couple years, they’ve quietly become a decent all-in-one grow gear brand.
The standout is their UIS™ platform, which lets you sync fans, lights, sensors, and their other gear to a central controller or app. We’ve heard it’s simple to set up and useful, if you’re the kind of person (like me) who can’t stop looking at the baby monitor. So scratch those itches, and check your humidity from your phone or automate a light schedule without fussing with timers.
AC Infinity is based in California, but, like most gear at this price point, the lights are made overseas.
| Pros | Cons |
|---|---|
| Samsung LM301H LEDs (aka primo diodes) | 2-year warranty is on the short side |
| Cross-compatibility with AC Infinity’s lights, fans, sensors and more | Frame isn’t modular or expandable |
| App-based control via UIS platform | A smidge pricey |
| Similar AC Infinity lights available to cover 2×2 ($119) and 2×4 ($249) |
Honorable mention
Spider Farmer SF2000 Pro | $176 | 2.7 µmol/J
Quiet EVO-board powerhouse with excellent 3×3 coverage.
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Alien OG Feminized
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28% THC | Hybrid
Best grow light for big yields: Spider Farmer G8600
| • Sastquatchian footprint and dense canopy coverage |
| • Pro-tier diodes and high PPF |
| • Flexible dimming and scheduling options |
| True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|
| 860W | 2.85 µmol/J | 4×4, 5×5 | 5 years | $489.99 |
Spider Farmer G8600
This beast is made to push plants to their full potential. Whether you’re running a CO2-enriched 5×5 or dialing in a sea of green, the G8600 dishes out serious light with full-spectrum Samsung and Osram diodes. The eight-bar design delivers high PAR uniformity, and it is smart controller-compatible for full-cycle automation.
More about Spider Farmer
Spider Farmer is one of those brands that pops up early when you’re shopping for LEDs, usually because they strike a balance between affordability and performance. They’ve been steadily improving over the years, and their latest lights are far better than the blurple budget panels they started with.
The G8600 is a solid example: high-end diodes, and enough output to push serious flower in a 4×4 (ideally) or 5×5 space. It’s maybe a bit too much for casual or small-space growers, but for folks chasing yield, it’s a legit option.
Spider Farmer is a China-based brand with decent support and a big enough user base that you can find tips and tricks for these easily online.
| Pros | Cons |
|---|---|
| Very high output and PPF | Way overpowered for small grows |
| Samsung + Osram diodes (best of the best, yo) | Bar layout may need extra hanging space |
| Smart controller ready |
Honorable mention
HLG 750 Diablo X | $1000 | 2.95 µmol/J (super high efficiency!)
Beefy pro-tier light with boosted reds for extra flower power.
Best grow light for autoflowers: Mars Hydro FC4800-EVO
| • High-efficiency bar design with even coverage |
| • Handles long light cycles with low heat |
| • Great size and price for homegrowers |
| True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|
| 480W | 2.85 µmol/J | 4×4, 5×5 | 5 years | $374.99 |
Mars Hydro FC4800-EVO
Autoflowers love light, and lots of it. The Mars Hydro FC4800 brings high-efficiency Samsung LM301H EVO diodes and a bar-style layout that evenly blankets your tent without frying your plants. It’s quiet, cool, and perfect for the longer 18–24 hour light schedules autos thrive on. This is a pro-level light that doesn’t feel like overkill for a homegrower.
More on autoflower lighting
Autoflowers thrive under longer light periods, often 20 hours on 4 off, with steady, full-spectrum LEDs . So we’re looking for a clean, even light with red and blue spectrum support (which this Mars light has in spades).
| Pros | Cons |
|---|---|
| Excellent PAR map and uniformity | Not the smallest form factor |
| Runs cool during long auto cycles | Controller sold separately |
| Righteous value for the specs |
Best overall grow light: HLG Tomahawk 720
| • US-built with pro-grade components |
| • Seriously efficient and quietly powerful |
| • Spectrum, dimming, and performance all dialed in |
| True wattage | Efficiency | Flower/veg coverage | Warranty | Price |
|---|---|---|---|---|
| 720W | 2.87 µmol/J | 5×5, 6×6 | 5 years | $999.00 |
HLG Tomahawk 720
If you’re after top-shelf za and want the gear to match, this is the light. The Tomahawk 720 is HLG’s answer to “What if we just made the best possible grow light for $1000?” It is overkill in the best way—massive output, full-spectrum tuning, and a thoughtful bar-style design that delivers uniform canopy coverage without cooking your tent. It’s built like a piece of industrial art, with reflectors and a remote driver that help keep temps and hotspots in check. If I had the space, the money, and enough time to trim all that gorgeous flower, I’d Instacart this beauty in an instant. I mean, maybe just one little treat for Justin, please?
| Pros | Cons |
|---|---|
| Made in the USA | It’s, um, a thousand dollars |
| Massive efficiency and full canopy spread | Definitely too much for what most folks need. Treat yourself. |
| Remotely mounted driver for cooler grow space |
Honorable mention
HLG Scorpion Diablo X | $1299 | 3.06 µmol/J (utterly ridiculous)
Pro level, high(est) efficiency, monster coverage (can do 4×4 up to 6×6), but, yeah, it’s $1300.
Final thoughts on the best grow lights
I’ve been growing for a while, and I can tell you there’s always a decent option for every budget and space. But I can also tell you that you’ll always wish you had better light.
When you’re growing, so many things can go wrong. Locking down the best grow light for your sitch gives you at least one thing you can absolutely count on to kick ass. Take out some of that guesswork! And give those plants what they crave—pure, unadulterated photons, from little ole adulterated you.
Why you can trust Leafly Picks
Leafly is the world’s leading cannabis discovery platform and provides a vast library of content from some of the most respected voices in cannabis. Leafly Picks prioritizes accuracy and integrity in our selections, working through mountains of research and testimonials to source products you can trust.
Justin Sund: Writer, Creative Producer, Home Grower
Justin Sund is an Emmy and Clio Cannabis Award-winning creative in Seattle who loves gardening, cooking ridiculously good food, and being silly with his family.
Anna Elliott: Senior Content Editor
Anna Elliott is a writer, editor, and longtime cannabis nerd based in Seattle. She joined Leafly in 2021 and currently works as the brand’s Senior Content Editor, where she helps shape stories about the best in weed from must-try strains to standout gear and gifts. Before Leafly, she spent nearly a decade reviewing products, covering emerging brands, and championing the people behind them. She’s passionate about making cannabis content accessible, fun, and genuinely helpful. And yes, she really does believe Space Mints hits different when you’re alphabetizing vinyl by mood.
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