Best Grow Lights for Microgreens in 2026

Every microgreen guide mentions grow lights. Almost none of them give you the actual PPFD numbers, the coverage footprint, or the honest comparison between a $20 T5 strip and a $120 quantum board. I spent 10 months running four different lights above rotating tray sets and taking notes. Here is what I found.

The short version: microgreens are not demanding about light. They do not need flowering-level intensity. They need consistent, full-spectrum light for 16 hours per day, positioned close to the trays (6-12 inches) to prevent leggy, stretched growth. A $25 T5 strip does that job well. You are overpaying for anything above $60-70 unless you are running a tiered growing rack that needs heat-free, even coverage across multiple shelves.

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Quick Picks

Light	Best For	Price	Wattage	PPFD at 6”	Coverage
Barrina T5 4-pack	Best Budget	$28	20W each (80W total)	~200 µmol/m²/s	4 ft run, 2 ft wide
Monios-L T5 4-pack	Best for Shelving Racks	$32	24W each (96W total)	~220 µmol/m²/s	4 ft run, 2 ft wide
AC Infinity IONGRID T24	Best Mid-Range	$89	100W	~450 µmol/m²/s	2x4 ft footprint
Spider Farmer SF-600	Best for Serious Growers	$129	100W	~600 µmol/m²/s	2x3 ft footprint

Do You Actually Need a Grow Light?

Before spending money on lighting, the honest question is whether your window provides enough light to grow microgreens without supplemental lighting.

Windows work if:

You have a south-facing window (in the Northern Hemisphere) that receives 4-6 hours of direct sun daily
You are growing in spring, summer, or early fall in a sunny climate
You are growing common fast-growing varieties: radish, mustard, arugula
You do not mind some leggy growth or slightly lower yield — window-grown microgreens are typically 20-30% taller and thinner than grow-light-grown batches

Windows do not work well if:

You have north-facing windows or heavily shaded windows
You are growing in winter (fewer daylight hours, lower light angle)
You want consistent, predictable results regardless of season or weather
You are growing light-sensitive varieties like sunflower or basil
You have your trays more than 2-3 feet from the window

I tested window-only growing for two months: south-facing window, Seattle in November. Results were consistently leggy — the microgreens stretched toward the glass and fell over before harvest. The same varieties under a T5 strip 8 inches above the tray stood upright and produced 20-30% more by weight.

The break-even point is simple: if you grow more than 1-2 trays at a time, or if you grow year-round, a $25-35 grow light pays for itself in better yields within a month.

Understanding PPFD: What the Numbers Mean for Microgreens

PPFD stands for Photosynthetic Photon Flux Density — the amount of light actually reaching your plant canopy per second. It is measured in micromoles per square meter per second (µmol/m²/s).

The numbers that matter for microgreens are lower than you might expect:

100-200 µmol/m²/s: Sufficient for germination and early growth; acceptable for fast-growing varieties
200-400 µmol/m²/s: Good for most microgreen varieties; produces upright, compact growth
400-600 µmol/m²/s: Ideal range for maximum yield and intensity; benefits thicker-stemmed varieties like sunflower and peas
600+ µmol/m²/s: Diminishing returns for microgreens; appropriate for herbs and leafy greens at this intensity

Comparison: cannabis flowering requires 600-900 µmol/m²/s. Tomatoes need 400-700 µmol/m²/s. Microgreens are among the least light-demanding crops you can grow — which is why a cheap T5 is genuinely adequate.

The distance rule matters more than wattage. PPFD drops off quickly with distance. A 20W T5 strip at 4 inches above the tray delivers roughly 280-320 µmol/m²/s. The same strip at 12 inches delivers around 120-150 µmol/m²/s. Keep lights close and measure from the canopy, not from the light fixture.

1. Barrina T5 LED Strip Lights — Best Budget Option

Price: $28 for a 4-pack on Amazon

The Barrina 4-pack is what I recommend to anyone who asks me about grow lights for microgreens. Four 2-foot T5 LED strips, linkable in a chain, with plug-and-play installation. Each strip draws 20W and produces full-spectrum light tuned for plant growth (6500K daylight spectrum with enhanced red and blue peaks).

At 6 inches above a 1020 tray, my measurements with a Apogee MQ-500 meter showed approximately 200 µmol/m²/s with two Barrina strips running side by side (necessary to cover the full 10-inch tray width). A single strip covers about 6 inches of tray width adequately — you want two strips per tray for uniform coverage.

At 4 inches, PPFD climbs to roughly 280 µmol/m²/s — more than adequate for every microgreen variety I grow.

The 4-pack allows you to light two full 1020 trays (two strips per tray) or four trays at lower intensity. For a beginner with 2-3 trays, this is genuinely all the light you need.

Heat output is minimal. LED technology means these strips run cool even when chained together. I have run four strips linked in a chain for 16 hours per day for months without heat problems. This matters for shelf-mounted growing systems where a hot HID or HPS light would cook the trays.

The linking cable is the weak point. The proprietary connectors between strips occasionally work loose. Tape the connections after setup and you will not think about them again.

Pros:

Cheapest effective option for home microgreen growing
Linkable chains allow flexible coverage across multiple trays
Cool running — no heat stress on greens
Full-spectrum output appropriate for plant growth
Easy installation — adhesive mounts or hanging clips

Cons:

Single strip does not cover a full 1020 tray width — you need 2 per tray
Proprietary link connectors can loosen over time
No dimmer or timer built in — you need a separate outlet timer
Coverage footprint requires planning for multi-shelf setups

What to buy with it: Outlet timer ($10-12, plug-in style, set to 16 hours on / 8 hours off) — Check price on Amazon. Wire shelving unit (optional, for mounting strips at consistent heights) — Check price on Amazon.

2. Monios-L T5 LED Full Spectrum — Best for Shelf Growing Racks

Price: $32 for a 4-pack on Amazon

The Monios-L is the Barrina’s main competitor at the same price range, and it edges ahead for one specific use case: mounting under wire shelving for a multi-tier growing rack. The Monios-L includes better mounting hardware (integrated clips that grip wire shelving directly) and slightly higher output at 24W per strip (vs 20W for Barrina).

At 6 inches, I measured approximately 220 µmol/m²/s with two strips side-by-side over a 1020 tray — marginally better than Barrina at the same distance. At 8 inches (the typical distance in a standard wire shelving unit with 12-14 inches of shelf-to-shelf clearance), the Monios-L produces around 170 µmol/m²/s. Adequate for most varieties, slightly dim for sunflower and pea shoots.

For wire shelving rack setups, the Monios-L mounting system is genuinely better than the Barrina adhesive strips. The clips do not require adhesive and can be repositioned easily when you reorganize your shelving. If you are setting up a dedicated 4-shelf microgreen growing rack, I would choose Monios-L over Barrina purely for the mounting hardware.

For countertop single-tray setups, the Barrina and Monios-L are interchangeable. Go with whichever is cheaper on the day you order.

Pros:

Slightly higher output than Barrina at the same price
Better mounting hardware for wire shelving installations
Linkable for multi-strip configurations
Cool running, full-spectrum output
Good value at $8 per strip

Cons:

Same coverage width issue as Barrina — need 2 strips per 1020 tray
No dimmer or timer built in
Clip mounting is better than adhesive but still plastic — can crack if overtightened
Less widely available than Barrina for in-person purchase

What to buy with it: Wire shelving unit, 4-tier ($45-55) for a complete growing rack — Check price on Amazon. Outlet timer ($10-12) — Check price on Amazon. Bootstrap Farmer 1020 trays (to fill each shelf) — Check price on Amazon.

3. AC Infinity IONGRID T24 — Best Mid-Range Option

Price: $89 on Amazon

The AC Infinity IONGRID T24 is the first light on this list that feels purpose-built for serious indoor growing rather than adapted from shop lighting. It is a 100W quantum board panel with Samsung LM301B diodes — the same diode technology in lights costing two to three times as much — in a compact 24x20 inch form factor.

At 6 inches, PPFD measured approximately 450 µmol/m²/s in the center of the footprint, dropping to around 340 µmol/m²/s at the edges of a 1020 tray. At 12 inches, center PPFD is about 280 µmol/m²/s with more even distribution across the tray. The higher hanging distance produces more uniform canopy coverage — important for professional-looking results and even growth across the full tray.

The built-in dimmer is genuinely useful. For microgreens specifically — which need significantly less light than the 100W maximum would provide at 6 inches — being able to dial back to 40-50% is practical rather than cosmetic. I run the IONGRID at 50% intensity for the first 4 days post-blackout, then bump to 75% for the final 3-5 days before harvest. This approach mirrors what commercial microgreen growers report on r/microgreens as producing the best balance of compact growth and high yield.

The footprint limitation: the IONGRID T24 effectively covers two 1020 trays side by side at its optimal hanging height. If you are running more than two trays at a time, you need additional lights or the strips below.

Heat output is noticeably more than T5 strips — not a problem in an open growing setup, but worth accounting for if you are growing in an enclosed cabinet or a tight shelving unit.

Pros:

Samsung LM301B diodes — excellent quantum efficiency
Built-in dimmer — adjustable from 10-100%
Higher PPFD than T5 options — better for dense canopy varieties
Even light distribution at 12-inch hanging height
Full-spectrum including UV and IR at the high end of the range

Cons:

$89 vs $28-32 for T5 strips — premium price for microgreens specifically
Heat output higher than T5 strips
Covers only 2 trays effectively at optimal height
Dimmer knob feels plasticky compared to the price point

What to buy with it: Adjustable hanging ratchets ($8, for height adjustment above trays) — Check price on Amazon. Smart outlet plug ($12, set light schedules via app) — Check price on Amazon.

4. Spider Farmer SF-600 — Best for Serious Growers

Price: $129 on Amazon

The Spider Farmer SF-600 is designed as a seedling and propagation light, which makes it well-matched for microgreens in ways general-purpose grow lights are not. Spider Farmer built a reputation for quantum board technology at accessible prices, and the SF-600 delivers legitimately impressive numbers for a sub-$150 light.

At 6 inches, I measured 580-620 µmol/m²/s in the center of the footprint — substantially more than the IONGRID T24 and far more than the T5 options. At 12 inches for more even coverage, center PPFD drops to around 380 µmol/m²/s with edge uniformity around 280 µmol/m²/s across a 2x3 foot footprint.

For microgreens specifically, this is more light than you strictly need. But the excess capacity has a practical use: you can hang the SF-600 higher (18-24 inches) and still deliver 200+ µmol/m²/s across a wider footprint — covering 3-4 trays at once at moderate intensity. This makes the SF-600 the best choice for growing 4+ trays simultaneously without needing multiple separate lights.

The SF-600 also includes a built-in dimmer (0-100%), a hanging kit, and a power cable. The daisy-chain output allows connecting multiple units to one controller — useful if you scale to a multi-unit setup.

Drawbacks: At $129, the SF-600 is expensive for microgreens where total light requirements are modest. The Barrina T5 strips at $28 produce results within 15-20% of the SF-600 for radish, broccoli, and kale. The yield difference at maximum SF-600 intensity vs optimal T5 intensity is real but not dramatic for most home growers.

The SF-600 makes more sense if you are also growing herbs, lettuce, or seedlings alongside your microgreens, where the higher PPFD and wider footprint earn their keep.

Pros:

Highest PPFD of any light on this list — 580-620 µmol/m²/s at 6”
Built-in dimmer allows precise intensity control
Daisy-chain output for multi-unit setups
Wide footprint covers 3-4 trays at optimal hanging height
Dual use for microgreens and other indoor crops

Cons:

$129 is hard to justify for microgreens-only setups
Higher heat output than T5 or IONGRID
More light than needed for cotyledon-stage harvests
Overkill for beginners and casual growers

What to buy with it: Adjustable hanging ratchets ($8) — Check price on Amazon. Smart outlet timer ($12) — Check price on Amazon. Temperature/humidity monitor ($12, for grow areas where heat output matters) — Check price on Amazon.

Full Spec Comparison

Spec	Barrina T5	Monios-L T5	AC Infinity IONGRID T24	Spider Farmer SF-600
Price	$28 (4-pack)	$32 (4-pack)	$89	$129
Wattage	20W per strip (80W total)	24W per strip (96W total)	100W	100W
PPFD at 6”	~200 µmol/m²/s	~220 µmol/m²/s	~450 µmol/m²/s	~600 µmol/m²/s
PPFD at 12”	~100 µmol/m²/s	~110 µmol/m²/s	~280 µmol/m²/s	~380 µmol/m²/s
Spectrum	Full spectrum (6500K)	Full spectrum (6500K)	Samsung LM301B full spectrum	Samsung LM301B full spectrum
Coverage Footprint	2 ft x 2 ft (2 strips)	2 ft x 2 ft (2 strips)	2 ft x 3 ft	2 ft x 3 ft (at 12”)
Built-in Dimmer	No	No	Yes (0-100%)	Yes (0-100%)
Trays Covered	2 (at 6”)	2 (at 6”)	2-3	3-4 (at 12-18”)
Heat Output	Very low	Very low	Low-moderate	Moderate
Best Hanging Height	4-8”	4-8”	8-14”	12-24”

Recommended Light Schedules

Microgreens need more light hours per day than most houseplants but less intensity than fruiting crops. The standard schedule that produces the best results in my setups:

16 hours on / 8 hours off. This schedule runs from, say, 6 AM to 10 PM — matching natural daylight hours extended slightly. The 8 hours of darkness are not strictly necessary for microgreens (they are not photoperiod-sensitive the way cannabis and some vegetables are), but giving them a rest period prevents cellular stress from continuous lighting and produces more natural growth patterns.

During blackout period (first 3-4 days): No light needed. The trays are covered and germinating in darkness. Run lights only after you uncover the trays.

Days 4-6 (post-blackout): Full light schedule, light at higher position (8-12 inches) for even coverage.

Days 7-harvest: Full light schedule, can lower light 1-2 inches for final push growth.

One cheap outlet timer set to 16/8 handles all of this automatically. I use a basic mechanical timer ($8-10) rather than a smart plug for grow lights — fewer failure modes and it keeps cycling reliably without WiFi.

Window Growing vs Grow Lights: The Real Trade-off

I want to be specific about what “using a window” actually means for results.

In my testing, south-facing window in spring/summer (Seattle, so not a sun-drenched climate):

Radish grow time: 9-11 days (vs 7-8 days under T5)
Average tray yield: 2.8 oz (vs 3.5 oz under T5)
Stem length at harvest: 3-4 inches (vs 2-2.5 inches under T5)
Leggy/fallen stems in tray: ~20% (vs ~5% under T5)

The window-grown greens were still good and still edible. The difference in stem length is a texture issue more than flavor — taller, thinner stems are more delicate and slightly less crunchy. The lower yield (20% less) matters if you are growing to save money or maximize production.

In winter, those same south-facing windows dropped to 2-3 hours of usable light daily. Tray yield fell to 1.8-2.2 oz, grow time stretched to 12-15 days, and stem quality declined further. A $28 Barrina 4-pack eliminated all of those seasonal variations immediately.

The takeaway: windows are viable for spring and summer growing in sunny climates. For year-round growing, or for anyone north of roughly 40 degrees latitude, a grow light is the difference between consistent results and seasonal frustration.

Bottom Line

New to microgreens with a few trays: Buy the Barrina T5 4-pack at $28 and a plug-in outlet timer at $10. Mount two strips above each tray at 6-8 inches, set for 16 hours on, and grow. This setup will produce excellent results for every common microgreen variety and will cost you less than a single bag of grocery store microgreens. Check price on Amazon

Setting up a wire shelving growing rack: The Monios-L 4-pack at $32 is designed for this use case, with mounting clips built for wire shelving. Buy two 4-packs for a 4-shelf rack (2 strips per shelf). Check price on Amazon

Growing 4+ varieties at once or adding herbs and leafy greens: The AC Infinity IONGRID T24 at $89 bridges the gap between basic strip lights and high-end quantum boards. The dimmer is genuinely useful and the Samsung diodes provide excellent light quality. Check price on Amazon

Scaling up or dual-use with other crops: Spider Farmer SF-600 at $129 is the most capable light on this list. Worth the premium if you are running 30+ trays per week or growing alongside herbs and seedlings that need higher PPFD. Check price on Amazon

Where to Learn More

r/microgrowery and r/microgreens — Both communities discuss grow light specifications in detail. Search for PPFD charts and grow light comparisons specific to small-scale growing.
Epic Gardening — Kevin Espiritu has published grow light reviews with measured PPFD data and honest assessments of the cost/performance trade-offs.
AC Infinity’s PPFD charts — Available on their product pages, these are more accurate than most competitor charts because they were independently verified.
Spider Farmer blog — Technical articles on quantum board technology and light schedules for different crop types.

Last updated March 2026.