When it comes to choosing the best supplemental greenhouse lighting, the key is balancing performance, ease of use, and cost. The Owleye 12FT Outdoor LED Grow Light String stands out for its weatherproof design, making it ideal for outdoor setups. For larger spaces, the EVERYGROW Greenhouse Grow Light String offers extensive coverage with full spectrum LEDs. The main tradeoffs in this category include durability versus affordability, and brightness versus energy efficiency. Continue reading to see how these options compare and which one fits your greenhouse needs best.
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Key Takeaways
- Top picks vary based on whether you prioritize outdoor durability, coverage area, or ease of installation.
- Full spectrum LED options generally deliver better plant growth results but often come at a higher price point.
- Longer cords and daisy chaining features provide flexibility but can complicate setup for novice users.
- Waterproof ratings like IP65 are essential for outdoor or humid environments to ensure longevity.
- More expensive models tend to offer dimming and programmable features, which are valuable for serious growers.
| Owleye 12FT Outdoor LED Grow Light String, IP65 Waterproof, Full Spectrum, 3 Bulbs |  | Best Overall for Outdoor Scalability and Reliability | Length: 12 ft | Power: 31 watts | PPF: 33.89 umol/s | VIEW LATEST PRICE | See Our Full Breakdown |
| EVERYGROW Outdoor Full Spectrum Greenhouse Grow Light String, IP65 Waterproof Daisy Chain LED, 21.3FT |  | Best for Large-Scale Outdoor Coverage and Safety | Length: 21.3 ft | Number of Bulbs: 6 | Wattage: 150 watts | VIEW LATEST PRICE | See Our Full Breakdown |
| AC Infinity IONBEAM S16 Full Spectrum LED Grow Light Bars, 16″ |  | Best for Supplemental and Inter-Canopy Lighting in Tighter Spaces | Light Source: Samsung LM301H EVO LEDs | Number of Bars: 4 | Wattage: 15 watts | VIEW LATEST PRICE | See Our Full Breakdown |
| VIVOSUN Outdoor LED Grow Light String, Full Spectrum, Waterproof, 12-Light with 44Ft Adjustable Cord |  | Best for Versatile Outdoor Use and Large Coverage Areas | Number of Lights: 12 | Total Power: 180W | Lumens: 39000lm | VIEW LATEST PRICE | See Our Full Breakdown |
| Barrina 4FT T8 Full Spectrum LED Plant Grow Light, 42W, 6 Pack |  | Best for Indoor Grow Tents and Shelves | Length: 4 ft (T8) | Wattage per Light: 42W | Total Wattage: 252W | VIEW LATEST PRICE | See Our Full Breakdown |
| Barrina Plant Grow Lights, 4FT 5000K Full Spectrum Daylight White, 6 Pack |  | Best Value for Versatile Full Spectrum LED Strips | Length: 4 ft | Color Temperature: 5000K | Wattage: 252W total (6 x 42W) | VIEW LATEST PRICE | See Our Full Breakdown |
| VIVOSUN LumaLight 100W Full Spectrum LED Grow Light |  | Best Smart-Enabled Compact Grow Light | Wattage: 100 watts | Spectrum: Full spectrum (3000K, 5000K, 660nm, 730nm) | Dimming: 4-level (25%–100%) | VIEW LATEST PRICE | See Our Full Breakdown |
| ELUFAH NHI3200 320W LED Grow Light, Full Spectrum Dimmable Indoor Plant Lamp |  | Best for Commercial-Grade Growth and Customization | Wattage: 320 watts | Spectrum: Grow Pro (6200K white, blue, far red) | Dimming: 0-100%” with RJ12 daisy-chaining | VIEW LATEST PRICE | See Our Full Breakdown |
| supplemental greenhouse lighting | Water Resistance | Wattage | Length |
|---|---|---|---|
| Owleye 12FT Outdoor LED Grow L | IP65 Waterproof | — | 12 ft |
| EVERYGROW Outdoor Full Spectru | IP65 Waterproof | 150 watts | 21.3 ft |
| AC Infinity IONBEAM S16 Full S | — | 15 watts | — |
| VIVOSUN Outdoor LED Grow Light | — | — | — |
| Barrina 4FT T8 Full Spectrum L | Not water resistant | — | 4 ft (T8) |
| Barrina Plant Grow Lights | Not Water Resistant | 252W total (6 x 42W) | 4 ft |
| VIVOSUN LumaLight 100W Full Sp | IP65 waterproof | 100 watts | — |
| ELUFAH NHI3200 320W LED Grow L | IP65 | 320 watts | — |
More Details on Our Top Picks
Owleye 12FT Outdoor LED Grow Light String, IP65 Waterproof, Full Spectrum, 3 Bulbs
This LED string light excels in outdoor greenhouses and gardens where durability and scalability matter most. Its IP65 waterproof housing ensures resilience against harsh weather, making it ideal for long-term outdoor use. Compared with VIVOSUN’s 12-light string, it offers similar waterproofing but supports up to 10 sets, providing greater expansion potential. The full spectrum with green light enhances plant growth without overly bright visual output, though the pink hue might be less appealing visually. The energy-efficient 31-watt draw delivers 3000 lumens, making it effective while maintaining low heat output. A key tradeoff is that the pink-tinted light may be distracting indoors or in visually sensitive settings, and bulbs may arrive damaged, requiring careful handling during shipping.
Pros:- IP65 waterproof and dustproof for outdoor durability
- Supports up to 10 sets for extensive coverage
- Energy efficient with high lumen output
Cons:- Pink-tinted light may be visually unappealing indoors
- Bulbs can arrive damaged or missing during shipping
Best for: Gardeners and outdoor growers needing scalable, weatherproof lighting that withstands the elements.
Not ideal for: Indoor growers seeking a neutral light color or aesthetic appeal, as the pink tint may be distracting indoors.
- Length:12 ft
- Power:31 watts
- PPF:33.89 umol/s
- Brightness:3000 lumens
- Water Resistance:IP65 Waterproof
- Number of Bulbs:3
Our verdict“This pick is perfect for outdoor growers who prioritize durability and scalability over visual aesthetics indoors.”
EVERYGROW Outdoor Full Spectrum Greenhouse Grow Light String, IP65 Waterproof Daisy Chain LED, 21.3FT
Compared with the Owleye string, the EVERYGROW 21.3-foot chain offers a longer reach and supports up to 120 lights from a single switch, making it ideal for large greenhouses or extensive outdoor beds. Its full spectrum, including 660nm red, supports all plant stages and maximizes photosynthesis. The UL certification and IP65 waterproof rating ensure safety and durability, while the aluminum body aids heat dissipation. However, it requires mounting 30-50 inches above plants, which might limit low-clearance setups. The corded design offers limited placement flexibility, and unused sockets need protection to maintain waterproofing. The high lumen output of 15,000 lumens makes it suitable for big spaces but might be overkill for small setups.
Pros:- Supports up to 120 lights via daisy chain for extensive coverage
- Full spectrum supports all plant growth stages
- UL certified with durable aluminum body
Cons:- Requires high mounting position, unsuitable for low greenhouses
- Corded power limits placement options
- Unused sockets need protection to maintain waterproofing
Best for: Large-scale outdoor growers needing a flexible, safe, and full-spectrum lighting system.
Not ideal for: Small indoor growers or those with limited mounting height, due to its size and mounting requirements.
- Length:21.3 ft
- Number of Bulbs:6
- Wattage:150 watts
- Lumens:15000
- Water Resistance:IP65 Waterproof
- Certification:UL
Our verdict“This product makes the most sense for large outdoor operations that need scalable, full-spectrum lighting with safety certifications.”
AC Infinity IONBEAM S16 Full Spectrum LED Grow Light Bars, 16″
The IONBEAM S16’s four 16-inch LED bars deliver targeted supplemental lighting, especially in grow tents or under primary lights. Its Samsung LM301H EVO LEDs achieve high efficiency at 3.14 µmol/J, translating into strong light output relative to power consumption. The magnetic mounting system simplifies installation, and the digital controller offers ten dimming levels plus scheduling, making it ideal for precise control. Compared to larger, more diffuse string lights, these bars focus light where plants need it most. However, with only 15 watts of power, it can’t serve as a primary source in high-light environments and is best used as a supplement. Corded power may limit flexibility, especially in mobile setups.
Pros:- High-efficiency Samsung LEDs for effective spectrum delivery
- Magnetic mounting for quick installation
- Programmable with multiple dimming and scheduling options
Cons:- Limited to 15W, unsuitable as primary lighting
- Corded power can restrict placement flexibility
Best for: Indoor growers needing customizable, high-efficiency supplemental lighting for canopy expansion or under-canopy coverage.
Not ideal for: Growers seeking primary lighting or large-area coverage, due to limited wattage and coverage area.
- Light Source:Samsung LM301H EVO LEDs
- Number of Bars:4
- Wattage:15 watts
- Max Lumens:3000
- Dimensions:16.02″L x 1.08″W
- Features:Dimmable, Programmable
Our verdict“This pick is ideal for growers seeking precise, efficient supplemental lighting in tight or targeted spaces.”
VIVOSUN Outdoor LED Grow Light String, Full Spectrum, Waterproof, 12-Light with 44Ft Adjustable Cord
The VIVOSUN 12-light string offers a powerful 39,000 lumens at 180W, making it suitable for large outdoor greenhouses or garden setups. Its full spectrum, including deep red, supports all growth stages, similar to the EVERYGROW string but with a higher total lumen output. The IP44 waterproof rating is slightly lower than IP65 but still adequate for most outdoor conditions, and the 44-foot adjustable cord provides flexible placement. Unlike the Owleye, which is more compact, VIVOSUN’s longer string can cover more area, yet the lack of water resistance for the sockets means additional protection is needed. This makes it a strong choice for those who need broad, bright illumination outdoors.
Pros:- High lumen output for large outdoor areas
- Full spectrum supports all plant stages
- Long, adjustable cord for flexible setup
Cons:- Not water-resistant enough for very harsh weather
- Sockets require protection to prevent water ingress
Best for: Outdoor growers who need extensive coverage with full-spectrum light and flexible cord length.
Not ideal for: Indoor growers or those with low-humidity environments, due to its IP44 rating and outdoor design focus.
- Number of Lights:12
- Total Power:180W
- Lumens:39000lm
- Waterproof Rating:IP44
- Cord Length:44 ft
- Spectrum:Full spectrum
Our verdict“This lighting string is best suited for large outdoor spaces where high brightness and coverage are priorities.”
Barrina 4FT T8 Full Spectrum LED Plant Grow Light, 42W, 6 Pack
Compared to larger outdoor strings, the Barrina 4ft T8 strips excel for indoor use, especially in grow tents or shelves where space is limited. Their full spectrum with a pinkish-white hue supports seedlings and mature plants alike, and the V-shaped reflector improves heat dissipation, extending LED lifespan. The 252W total power replaces much higher wattage traditional lighting, making them highly efficient. The linkable design allows connecting up to six strips, ideal for customizing light zones. However, these are not waterproof and are strictly for indoor environments. The need for special connector cables for linking newer models adds complexity. Still, their high efficiency and ease of installation make them a popular choice for indoor growers on a budget.
Pros:- High efficiency with 252W replacing much higher wattage
- Easy to install with included mounting accessories
- Linkable up to 6 strips for flexible layout
Cons:- Indoor only, not water-resistant
- Requires compatible cables for linking newer models
Best for: Indoor growers needing customizable, efficient lighting for small to medium grow tents or shelves.
Not ideal for: Outdoor growers or those needing water-resistant fixtures, since these are designed for indoor use only.
- Length:4 ft (T8)
- Wattage per Light:42W
- Total Wattage:252W
- Brightness:3100 lumens
- Connectivity:Wired, linkable up to 6
- Water Resistance:Not water resistant
Our verdict“This product suits indoor growers seeking customizable, cost-effective lighting with high efficiency.”
Barrina Plant Grow Lights, 4FT 5000K Full Spectrum Daylight White, 6 Pack
This set of six 4-foot LED strips stands out for providing a full-spectrum 5000K white light that’s gentle on the eyes while supporting all plant growth stages, from seeding to flowering. Compared with the VIVOSUN LumaLight 100W, these strips offer a broader coverage and easier installation with flexible linking options, making them ideal for larger setups. The V-shaped reflectors boost efficiency, translating into more light where plants need it most, yet they lack water resistance, limiting use to indoor environments. The simplicity of connection and the lifetime warranty make these a reliable choice for growers seeking affordable, scalable lighting. However, the non-waterproof design means they aren’t suited for humid or greenhouse environments. Overall, these strips are a smart pick for budget-conscious growers looking to expand their lighting capacity without complexity.
Pros:- Full-spectrum 5000K white light ideal for all growth stages
- High efficiency with V-shaped reflectors and aluminum housing
- Easy to install with included mounting accessories
- Linkable up to 6 strips for flexible coverage
Cons:- Not water resistant, limiting use to indoor dry environments
- Requires new connector cables for older models, adding potential setup complexity
Best for: Home growers and hobbyists wanting scalable, full-spectrum lighting for multiple indoor plants or grow tents
Not ideal for: Growers needing waterproof solutions for humid or greenhouse environments; those requiring advanced smart features
- Length:4 ft
- Color Temperature:5000K
- Wattage:252W total (6 x 42W)
- Number of LEDs:1152
- Light Output:2100 lumens per strip
- Mounting Type:Ceiling Mount
- Water Resistance:Not Water Resistant
- Warranty:Lifetime
Our verdict“This product suits indoor growers seeking a cost-effective, scalable lighting solution with broad coverage.”
VIVOSUN LumaLight 100W Full Spectrum LED Grow Light
The VIVOSUN LumaLight 100W excels in delivering a balanced full spectrum with 3000K, 5000K, 660nm, and 730nm light for comprehensive plant support, from seedling to harvest. It’s better suited to small grow tents like 2×2 or 2×4, especially given its 100W power, which makes it an energy-efficient option compared to higher wattage alternatives like the ELUFAH NHI3200. Its waterproof IP65 rating and dustproof design make it resilient for humid environments, while the smart dimming and app control via VIVOSUN GrowHub add a layer of precision that hobbyists and semi-professional growers appreciate. The main tradeoff is that it may lack enough power for larger setups, and the smart controller is sold separately, adding to the cost. For growers seeking a compact, smart-enabled light for small spaces, this model delivers excellent value.
Pros:- Full spectrum with multiple wavelengths supporting all plant stages
- IP65 waterproof and dustproof for humid environments
- Smart dimming and app control for precise operation
- Compact size fits small tents or grow cabinets
Cons:- Limited wattage may underperform in larger grow areas
- Smart controller sold separately adds extra cost
Best for: Small-scale growers and hobbyists who want smart features and reliable coverage in limited spaces
Not ideal for: Larger commercial growers or those needing intense lighting for big grow rooms
- Wattage:100 watts
- Spectrum:Full spectrum (3000K, 5000K, 660nm, 730nm)
- Dimming:4-level (25%–100%)
- Water Resistance:IP65 waterproof
- Coverage:Fits 2×2 / 2×4 grow tents
- Lifespan:Up to 36,000 hours
Our verdict“This light makes the best choice for small grow spaces where smart control and durability matter most.”
ELUFAH NHI3200 320W LED Grow Light, Full Spectrum Dimmable Indoor Plant Lamp
The ELUFAH NHI3200 stands out for its impressive 320W power and full-spectrum “Grow Pro” design, supporting plant growth from seedling through flowering in larger or commercial setups. Its 0-100% dimming and RJ12 daisy-chain capability make it highly adaptable for multi-light arrangements, especially in professional or large-scale greenhouse environments. Its cooling system, which reduces temperature and light attenuation, offers consistent performance over time—more reliable than smaller, less robust models like the VIVOSUN LumaLight. However, the higher power draw raises electricity costs, and it’s likely overkill for hobby growers with small spaces. The foldable aluminum design makes installation easier, but the higher price point reflects its commercial focus. This model is ideal for growers needing high-output lighting with extensive control options and scalability.
Pros:- Full spectrum with commercial-grade Grow Pro spectrum
- Dimmable 0-100% with daisy-chaining of up to 20 lights
- Effective cooling reduces heat and light attenuation
- IP65 waterproof and foldable for easy installation
Cons:- Higher power consumption increases electricity costs
- Designed more for larger setups, may be overkill for small grows
Best for: Commercial growers or serious hobbyists managing large grow rooms or multiple units requiring uniform, high-intensity lighting
Not ideal for: Small hobbyists or those with limited budgets, due to its higher power consumption and cost
- Wattage:320 watts
- Spectrum:Grow Pro (6200K white, blue, far red)
- Dimming:0-100%” with RJ12 daisy-chaining
- Cooling:Honeycomb aluminum cooling
- Water Resistance:IP65
- Dimensions:27″L x 23″W x 3″H
Our verdict“This fixture is perfect for large-scale or professional growers needing high output and extensive control options.”
How We Picked
I evaluated these products based on performance, build quality, ease of installation, value for money, and suitability for different greenhouse sizes. I prioritized options with reliable waterproof ratings, energy efficiency, and full spectrum lighting that supports healthy plant growth. Products were ranked by how well they meet these criteria, with a focus on practical usability and durability in real-world greenhouse environments. This approach ensures each pick addresses specific grower needs, from beginners to advanced horticulturists.| supplemental greenhouse lighting | Water Resistance |
|---|---|
| Owleye 12FT Outdoor LED Grow L | IP65 Waterproof |
| EVERYGROW Outdoor Full Spectru | IP65 Waterproof |
| AC Infinity IONBEAM S16 Full S | — |
| VIVOSUN Outdoor LED Grow Light | — |
| Barrina 4FT T8 Full Spectrum L | Not water resistant |
| Barrina Plant Grow Lights | Not Water Resistant |
| VIVOSUN LumaLight 100W Full Sp | IP65 waterproof |
| ELUFAH NHI3200 320W LED Grow L | IP65 |
Factors to Consider When Choosing Best Supplemental Greenhouse Lighting
Choosing the right supplemental greenhouse lighting involves understanding several key factors. The best light should match your greenhouse size, plant types, and budget, while also offering durability and energy efficiency. Avoid common pitfalls like overspending on features you don’t need or selecting lights that aren’t waterproof for outdoor use. Carefully considering these factors helps you get the most value and healthy plant growth from your investment.Coverage Area and Light Intensity
Assess your greenhouse size and plant density when selecting a light. Larger spaces require higher wattage or multiple fixtures, while smaller setups benefit from compact, focused lighting. Brightness (lumens or PAR values) directly affects plant growth, so choose a model that provides sufficient light intensity without wasting energy. Remember, more isn’t always better if your plants aren’t receiving even coverage, so consider models with adjustable angles or daisy chaining capabilities.
Durability and Waterproofing
If your greenhouse is outdoors or in humid environments, waterproofing becomes essential. Look for IP ratings like IP65, which indicate resistance to dust and water jets, ensuring longevity despite weather exposure. Cheaper, non-waterproof lights may fail quickly under these conditions, leading to higher replacement costs. Balance durability with cost, and consider whether additional protective enclosures are necessary for your setup.
Spectrum and Light Quality
Full spectrum LED lights mimic natural sunlight, promoting healthy plant growth and flowering. Cheaper lights with limited spectrums can hinder plant development or cause uneven growth. Pay attention to the color temperature—around 5000K to 6500K is ideal for most leafy greens and vegetative growth. Premium models often include adjustable spectrums or dimming features, offering greater control over your growing environment.
Energy Efficiency and Cost
Energy consumption impacts long-term costs, especially if your greenhouse requires multiple fixtures. LED lights are generally more efficient than fluorescent or incandescent options, but variations exist. High upfront costs for premium, dimmable lights can be offset by lower electricity bills and longer lifespan. Consider your budget and whether additional features like programmable timers justify the extra expense.
Ease of Installation and Maintenance
Simpler mounting options and adjustable cords save time during setup. Check if the lights come with hanging hooks, adjustable brackets, or daisy chaining features for flexible positioning. Maintenance considerations include dust buildup, heat dissipation, and the availability of replacement parts. Investing in durable, low-maintenance fixtures reduces ongoing effort and ensures consistent illumination.
Frequently Asked Questions
Can I use regular indoor LED lights for my greenhouse?
While regular indoor LED lights might seem convenient, they often lack the durability and waterproofing necessary for outdoor or humid greenhouse conditions. They may also not provide the full spectrum of light needed for healthy plant growth. For best results, choose lights specifically designed for horticultural use, which are built to withstand environmental factors and support plant development effectively.
How many LED fixtures do I need for a small greenhouse?
The number of fixtures depends on your greenhouse size, plant type, and light intensity. As a general rule, aim for about 20-40 watts per square meter for leafy greens, and adjust based on the fixture’s coverage area and lumen output. Over-lighting can waste energy and potentially harm plants, so it’s better to start with fewer fixtures and add more if needed. Proper spacing ensures even light distribution and healthy growth.
Are waterproof ratings enough to guarantee durability outdoors?
Waterproof ratings like IP65 are a strong indicator of weather resistance, but overall durability also depends on build quality, heat dissipation, and environmental exposure. Even waterproof fixtures can fail if exposed to extreme temperatures, UV rays, or physical damage. Regular inspection and maintenance extend the lifespan of outdoor lighting, so choose reputable brands with good reviews for outdoor use.
Is full spectrum lighting worth the extra cost?
Full spectrum lighting is generally more effective for plant growth because it mimics natural sunlight, supporting both vegetative and flowering stages. Although it may cost more upfront, it can lead to healthier, faster-growing plants and better yields. Cheaper lights with limited spectrum may suffice for simple greenery but often fall short for more demanding crops or flowering plants. Investing in quality full spectrum LEDs pays off over the long term.
How important is energy efficiency for greenhouse lighting?
Energy efficiency impacts ongoing operational costs and environmental footprint. LED lights are the most energy-efficient option, but variations exist among models. Choosing a more efficient fixture with features like dimming and programmable timers can significantly lower electricity bills, especially if your setup requires multiple lights. Balance initial investment with long-term savings to find the best value.
Conclusion
For most growers, the Owleye 12FT Outdoor LED Grow Light String offers excellent durability and coverage, making it ideal for outdoor setups. Beginners or small-scale growers should consider the Barrina 4FT T8 Full Spectrum LED for affordability and ease of use. Serious hobbyists or commercial growers needing precise control and premium features might prefer the ELUFAH NHI3200 320W LED Grow Light. Overall, choosing the best supplemental lighting depends on your specific needs, budget, and environment—consider these factors carefully to support healthy, vigorous plant growth.
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