New Zealand winters — especially in Auckland and Wellington — can push indoor light levels so low that even sun-loving plants struggle. The fix? A decent grow light, and Mitre 10 stocks options that won’t break the bank. This guide cuts through the marketing noise and gives you the specifics on what’s actually available, what works, and how to use it without turning your lounge into a science experiment.

4 related posts

Philips LED Plant Grow Bulb Power: 16 Watt Cool White · We the Wild Grow Lamp Feature: Full-spectrum natural sunlight mimic · Common Grow Light Benefit: Grow plants fast and healthily · E27 Bulb Availability: Hardware stores like Mitre 10 · LED Grow Light Starting Price: Around $10

Quick snapshot

1Confirmed facts
2What’s unclear
  • Exact current stock levels and specific model availability at individual Mitre 10 store locations
  • Search volume and demand data for grow lights at Mitre 10 specifically
3Timeline signal
  • Love That Leaf’s grow light guide remains a top NZ reference for indoor plant enthusiasts (Love That Leaf NZ plant guide)
  • Full spectrum LED technology has matured, with prices dropping and availability increasing across NZ retailers (Love That Leaf NZ plant guide)
4What’s next
  • NZ indoor gardeners increasingly pair grow lights with smart timers — power point timers start around $10 at Mitre 10 (Love That Leaf NZ plant guide)
  • Full-spectrum LEDs are replacing older pink “blurple” lights as the default recommendation for home use (Love That Leaf NZ plant guide)

Here are the key facts driving this guide: Mitre 10’s top pick, the recommended distance and runtime for best results, and what to expect to pay.

Label Value
Top Mitre 10 Product Philips LED Plant Grow Bulb 16W
Key Benefit Grow plants fast and healthily
Installation Plug and play, E27 base
Alternative Retailer Mention Bunnings NZ for similar

Can any LED light be used as a grow light?

Short answer: no. Here’s why the distinction matters. Regular LED house lights are built for human illumination — they prioritise the spectrum our eyes find comfortable (heavy on green and yellow, minimal red and blue). Plants, on the other hand, are greediest for red and blue wavelengths to drive photosynthesis.

Grow light vs regular light differences

Full spectrum grow lights look white to our eyes because they emit across the visible spectrum including red and blue — the same wavelengths sunlight provides. Regular LEDs typically skip the deep reds and blues that plants crave, focusing instead on what looks good under a ceiling lamp. The difference is visible when you compare a grow light’s color rendering index against a standard bulb: the grow light scores higher on plant-relevant metrics but sometimes looks “off” to human eyes.

Will any LED light work as a grow light?

For low-light plants like Peace Lily or ZZ Plant, a standard LED house light can provide enough photons to maintain the plant — just not to push vigorous growth. According to Love That Leaf’s NZ plant care guide, these plants can survive on as little as 50 FC (10 µmol) for maintenance. But for anything sun-hungry like a Monstera or Pothos, you’ll need something closer to their natural habitat’s intensity.

Upsides

  • Full spectrum LEDs mimic natural sunlight effectively
  • E27 base makes retrofitting existing lamps straightforward
  • Prices have dropped — basic models start around $10
  • Lower heat output than older technologies, safer for foliage

Downsides

  • Not all LEDs provide balanced red/blue spectrum for optimal growth
  • Cheap models may overstate wattage without matching output
  • Higher upfront cost than standard LED bulbs
  • Requires understanding of distance and runtime for best results
Bottom line: The implication: if you’re serious about indoor growing beyond keeping succulents alive, a dedicated grow light pays off. Regular LEDs are a band-aid, not a solution.

What type of grow light is best for indoor plants?

For most NZ home growers, full-spectrum LED wins. It covers the wavelengths plants need without the pink-purple aesthetic that makes your spare room look like a cannabis farm. Both Philips and We the Wild options at Mitre 10 represent solid entry points.

LED vs other grow light types

Fluorescent tubes were the old standard — and they’re still fine for seedlings and low-light plants. But LEDs deliver more photons per watt, run cooler, and last longer (50,000+ hours vs fluorescent’s roughly 10,000). High-intensity discharge (HID) lights are overkill for home use: they need venting, generate serious heat, and are better suited to commercial setups.

Best options at Mitre 10

The Philips 16W Cool White LED Plant Grow Bulb fits standard E27 sockets — it’s plug-and-play with a spec designed to promote blossoms and fruit. Pair it with a basic desk lamp and you’ve got an instant growing station. For more demanding plants, the We the Wild Instant Sun lamp offers full-spectrum coverage that more closely mimics natural sunlight.

The upshot

Full spectrum LEDs cost more upfront than standard bulbs, but they deliver 2–3× the usable light for plant growth. For NZ gardeners dealing with dim winters, that’s the difference between a struggling Monstera and one that actually pushes out fenestrations.

What are the disadvantages of LED grow lights?

LEDs aren’t perfect. Understanding the downsides helps you avoid expensive mistakes — like buying a light that’s too powerful and burning your plants before you’ve even enjoyed your morning coffee.

Pros and cons overview

The main advantage of LEDs — concentrated output — is also their main risk. A high-output LED held too close to seedlings can cause photobleaching, where leaves turn yellow and growth stalls. Younger plants are more vulnerable than mature ones, so start with lights further away and move closer as plants establish.

Intensity and distance issues

Most LEDs can’t be dimmed with standard dimmer switches, so managing intensity means controlling distance. The sweet spot varies by output: a 24W Sunbulb LED works at 30cm to 1.5m depending on your plants’ needs, while a powerful full-spectrum panel might need 60cm or more. Love That Leaf’s expert guide recommends at least 30cm clearance as a starting point, with 60cm to 1m for higher-output units.

Why this matters

Higher output grow lights should be placed further from plants. This isn’t a marketing line — it’s physics. A panel that looks impressive on paper can damage foliage if you don’t respect the distance guidelines.

How many hours a day should plants be under a grow light?

Most indoor plants thrive on 12–16 hours of grow light per day, followed by at least 8 hours of complete darkness. That dark period isn’t optional — it’s when plants respire and process the energy they’ve built up through photosynthesis. Skip it, and you’ll see leggy growth, pale leaves, and general decline even under otherwise perfect conditions.

Daily light cycle recommendations

The 12-16 hour window covers most common houseplants. Leafy greens and seedlings can tolerate the longer end (16 hours), while flowering plants often benefit from a shorter vegetative period before shifting to longer days to trigger blooming. Love That Leaf’s authoritative guide on indoor grow lights emphasises that darkness isn’t wasted time — it’s when the plant does its actual growing.

Adjusting for plant types

Different plants have different appetites. Monstera, a relatively demanding tropical, needs 100 FC (20 µmol) minimum for maintenance and 400 FC (80 µmol) for active growth. Pothos, by contrast, can handle up to 3000-5000 FC (600-1000 µmol) for commercial-scale production — though home growers won’t need that intensity. Peace Lily sits at the low end: 50 FC (10 µmol) keeps it alive, though it won’t flourish.

Bottom line: LED grow lights are the practical choice for NZ indoor gardeners who want results without a commercial setup. Philips or We the Wild options from Mitre 10 cover most home growing needs. For demanding plants like Monstera, run the lights 14–16 hours daily at proper distance. For low-light survivors like Peace Lily, 10–12 hours at lower intensity may suffice. Buy a timer ($10 at Mitre 10) and set it once — your plants don’t care if you remember.

What is the difference between LED lights and grow lights?

This is where the marketing gets slippery. Every LED is technically a “grow light” in that plants can photosynthesise under it — but not every LED delivers the spectrum plants actually need to thrive.

Spectrum and wavelength focus

Grow lights optimise for the red (around 660nm) and blue (around 450nm) wavelengths that drive photosynthesis most efficiently. This is called PAR (Photosynthetically Active Radiation). Regular LEDs prioritise lumens — a measure calibrated to human vision — which often means more green and yellow light and less of the red/blue that plants actually use.

Suitability for indoor plants

The wattage figure on an LED tells you electricity consumption, not light output or quality. What matters for growing is PPFD (Photosynthetic Photon Flux Density), measured in µmol/m²/s. A cheap 20W grow light might output less usable photons for plants than a properly designed 10W unit. Look for full-spectrum claims and, ideally, PAR data — though this is rarely provided on consumer packaging.

The key takeaway here: ignore wattage alone and look for spectrum data when comparing grow lights, even if that information isn’t prominently displayed on the box.

Spec Detail
Minimum Distance 30cm from plant canopy (Love That Leaf)
Recommended Distance 60cm to 1m for higher-output units
Ideal Runtime 12–16 hours per day
Dark Period Required Minimum 8 hours for healthy growth
Beam Angle — Wide 45–120° for closer placement (30–120cm)
Beam Angle — Narrow 5–45° for further placement (60cm–2m)
E27 Socket Standard at Mitre 10, fits most desk lamps
Timer Cost Starting around $10 (Mitre 10)
LED Lifespan 50,000+ hours typical
IP Rating (Indoor) IP20 to IP40 — airflow needed in high humidity
Dimmer Compatibility Most consumer LEDs cannot use dimmer switches

How to choose and use grow lights from Mitre 10

Putting together a functional grow light setup doesn’t require a horticulture degree. Here’s what a typical NZ home grower needs to know before heading to Mitre 10 or ordering online.

Step 1: Assess your plants’ light needs

Identify which plants you’re trying to support. Low-light plants (Peace Lily, ZZ Plant) need less intensity and shorter runtime. Medium-demand plants (Monstera, Philodendron) need 12–14 hours at moderate distance. High-light plants (herbs, flowering species) need the most attention and potentially higher-output fixtures.

Step 2: Choose your light type

For most Mitre 10 shoppers, a Philips 16W LED grow bulb with E27 fitting covers the basics. If you’re running multiple plants or need to cover a larger area, look at full-spectrum panel-style lights from specialist retailers like Herbal House NZ grow light specialist — the 4Seasons NOVA 420 at $499.99 and NOVA 720 at $599.99 offer more power for serious indoor gardens.

Step 3: Set up your distance and timing

Start with the light at 60cm from your plants. After a week, check for signs of stretching (light too weak) or yellowing/bleaching (light too strong). Adjust accordingly. Set a power point timer to handle the on/off cycle — this is non-negotiable if you want consistent results. Don’t exceed 16 hours; the dark period matters.

Step 4: Monitor and adjust

Watch for new growth as a sign of success. Leggy, elongated stems usually mean the light is too weak or too far away. Brown, crispy leaf edges suggest the light is too close or running too long. Younger plants need more distance than mature specimens.

“LED grow lights should be at least 30cm away from plants. You’ll often see 60cm to 1 metre recommended for LED grow lights depending on their output.”

— Love That Leaf Guide (NZ plant care resource)

“Full spectrum lights look like sunlight and appear ‘white’ but give plants the full spectrum, including red and blue. Unlike pink/purple ‘blurple’ lights that only emit red and blue.”

— Love That Leaf Guide (NZ plant care resource)

Related reading: Mitre 10 Smoke Alarms · Mitre 10 Bar Stools

Additional sources

theplantcompany.co.nz, youtube.com

Mitre 10’s lighting selection extends from Philips LED grow bulbs for indoor plants to their solar lights range suited for outdoor gardens.

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Frequently asked questions

How far should LED grow lights be from plants?

At minimum, 30cm. For most moderate-output LEDs, 60cm to 1m works well. Higher-output units may need 1m or more. Start conservative and move closer only if plants show signs they need more light.

What plants don’t like light?

No plant genuinely dislikes light — they need it for photosynthesis. However, some species (Peace Lily, ZZ Plant, Snake Plant) tolerate low-light conditions better than others. These are your options if you want to avoid grow lights entirely, though they won’t actively grow in dim spaces.

Are solar grow lights available at Mitre 10?

Solar grow lights exist but are designed for outdoor garden use, not indoor plant cultivation. For indoor growing, you need electric grow lights. Mitre 10 stocks E27-compatible LED grow bulbs and timers for indoor setups.

Can outdoor grow lights be used indoors?

Outdoor-rated grow lights typically have higher IP ratings (dust and water resistance) and may produce more heat. While not dangerous indoors, they’re usually overkill and cost more than what’s needed for a windowsill or shelf setup.

What is a grow light bulb for NZ homes?

A grow light bulb is an LED (usually E27 fitting) designed to emit light wavelengths plants need for photosynthesis. Available at Mitre 10 and other NZ hardware stores from around $10, they’re the cheapest way to supplement natural light during NZ’s dark winters.

How to choose grow lights at Bunnings NZ?

Bunnings and Mitre 10 offer similar ranges of E27 grow bulbs. Look for “full spectrum” claims, check the wattage against your space needs, and buy a timer separately — both retailers stock power point timers starting around $10.

Do grow lights work for low-light houseplants?

Yes, but you may not need them. Plants like Peace Lily and ZZ Plant survive on surprisingly little light. Grow lights accelerate growth and improve plant health, but they aren’t mandatory for low-light species unless you want faster, more vigorous results.

The trade-off

Grow lights solve the NZ winter light problem, but they add electricity cost and require attention to distance and timing. For occasional gardeners, a basic Philips 16W bulb and a $10 timer from Mitre 10 is the sweet spot — minimal investment for noticeable plant improvement. For serious indoor growers running multiple high-output fixtures, expect to budget for both the hardware and a bit more on your power bill.

For NZ indoor gardeners, the choice is straightforward: a Philips or We the Wild full-spectrum LED from Mitre 10, paired with a $10 timer, covers most home growing needs without requiring a commercial setup. Run it 12–16 hours daily, keep at least 30cm clearance from foliage, and watch your Monstera actually put out those fenestrations you’ve been waiting for.