When selecting far red grow light bars, growers seek powerful, efficient options that promote flowering and plant health. The Spider Farmer SUPP-UV60 & IR30 stands out as the best overall for its balanced spectrum and build quality. The Mars Hydro ADlite UV55 & IR30 offers excellent coverage for larger setups, making it a strong contender. However, tradeoffs include higher cost and complexity compared to simpler models. Keep reading to see how these options compare and find the perfect fit for your indoor garden.
Get the latest gadgets delivered free with Prime
- Fast, free delivery on millions of items
- Prime Video, Amazon Music and more included
- Member-only deals all year
Complete the kit
Key Takeaways
- The best grow light bars balance spectrum quality with energy efficiency, making the Spider Farmer SUPP-UV60 & IR30 a top choice.
- Coverage area is critical; larger coverage models like the Mars Hydro ADlite suit bigger grow spaces, but come at a higher price.
- Waterproof and dimming features add versatility but often increase the cost, mainly seen in high-end models.
- Deep red LEDs at 660nm are essential for flowering but should be paired with full-spectrum options for healthy growth.
- Build quality and ease of installation differentiate premium picks from more basic models, impacting long-term value.
| far red grow light bar | Light Source Type | Number of Light Sources | Material | Power Source |
|---|---|---|---|---|
| Spider Farmer SUPP-UV30 & IR16 | LED | 4 | Aluminum and metal | — |
| Mars Hydro ADlite UV55 & IR30 | LED | — | Aluminum | Corded Electric |
| RDJ Bouns Under Canopy LED Gro | LED | — | — | Corded Electric |
| Spider Farmer SUPP-R30 660nm D | LED | 88 | Aluminum | — |
| Spider Farmer SUPP-UV60 & IR30 | LED | 4 | — | Kabelgebunden |
| Spider Farmer GlowR40 LED Plan | — | 2 | Aluminum, Polycarbonate | — |
| Spider Farmer SUPP-R60 660nm D | — | 2 | Aluminum | — |
| Mars Hydro ADlite UV30 & IR15 | LED | 3 | Aluminum | Corded Electric |
More Details on Our Top Picks
Spider Farmer SUPP-UV30 & IR16 LED Grow Light Bars Set 23.6″ (4-Bar)
This set offers a balanced combination of UV and IR diodes spread across four bars, making it ideal for growers who want a comprehensive light spectrum. Compared to the Spider Farmer SUPP-UV60 & IR30, it provides a slightly more compact setup with a long lifespan of 50,000 hours, but it’s less powerful in coverage. Its durable build and smart control compatibility enhance its appeal for hobbyists and semi-professional growers. The main tradeoff is the need for careful adjustment to optimize light across different plant stages, and its energy efficiency remains unclear. Nonetheless, this set excels in flexibility and reliability for small to medium indoor grow tents.
Pros:- Densely arranged diodes support robust plant growth
- Long lifespan of 50,000 hours ensures longevity
- Compatible with smart controls for customizable operation
- Durable materials suitable for various grow environments
Cons:- Requires tuning based on plant growth stage
- Limited information on overall energy efficiency
Best for: Indoor growers seeking a versatile, durable, and smart-controlled supplemental lighting setup.
Not ideal for: Growers with very large tents or commercial facilities needing high-intensity lighting over extensive areas.
- Light Source Type:LED
- Light Source Wattage:30 watts
- Number of Light Sources:4
- Material:Aluminum and metal
- Item Dimensions:23″ L x 23.6″ W x 23.6″ H
- Warranty:30-Day Return Guarantee
Our verdict“This set is best for indoor growers prioritizing flexibility, durability, and integrated control over large-scale coverage.”
Mars Hydro ADlite UV55 & IR30 LED Grow Light for Indoor Plants, 4x4ft Coverage
The Mars Hydro ADlite UV55 & IR30 is designed to mimic natural sunlight cycles, making it a top choice for growers aiming to accelerate flowering and fruiting. Unlike the Spider Farmer SUPP-UV60 & IR30, which offers full spectrum lighting, this unit emphasizes UV and IR waves, which are critical for flowering stages. Its 500W power supports larger areas, but it requires a dedicated main light and isn’t recommended for vegetative growth alone, especially during early stages. The UV and IR spectrum can boost flowering, but for general growth, a broader spectrum might be preferable. Its targeted design makes it ideal for those focused on mature plants needing advanced spectral support.
Pros:- Simulates natural sunlight cycles for better flowering
- Provides UV and IR support for mature plants
- Suitable for both commercial and home use
Cons:- Needs a main 500W or higher light for effective use
- Limited coverage area for very large or multiple tents
Best for: Growers seeking to enhance flowering with natural sunlight simulation in medium to large grow spaces.
Not ideal for: Beginners or growers needing full-spectrum lighting for all growth stages without additional supplements.
- Light Source Type:LED
- Power Source:Corded Electric
- Wattage:500 watts
- Coverage:4×4 ft
- Material:Aluminum
- Mounting Type:Rack Mount
Our verdict“Ideal for growers focused on flowering enhancement through sunlight simulation, but requires supplemental or primary lighting for full cycle coverage.”
RDJ Bouns Under Canopy LED Grow Light Bar, 120W, Full Spectrum, IP65 Waterproof, Dimming, 46 Inch
The RDJ Bouns U120 offers full spectrum lighting with waterproof IP65 rating, making it a strong choice for humid environments or under-canopy applications. Compared to the Spider Farmer SUPP-R30, which specializes in deep red, this model provides a broader spectrum, supporting all growth stages. Its waterproof design is a key advantage for growers working in moist conditions, but the 120W power limits its use to smaller or supplemental roles rather than large-scale lighting. Dimming and daisy chaining add flexibility, yet the absence of mounting hardware and the relatively lower lumen output mean it’s less suited for high-intensity needs or large setups.
Pros:- Waterproof IP65 design withstands humid conditions
- Full spectrum supports all growth stages
- Dimmable with daisy chain for scalability
- High brightness with over 16,000 lumens
Cons:- Limited to 120W, not suitable for extensive coverage
- Requires compatible controllers for daisy chaining
Best for: Indoor growers needing a waterproof, full-spectrum light for humid environments or under-canopy use.
Not ideal for: Large-scale commercial growers requiring high wattage and broad coverage for main lighting.
- Light Source Type:LED
- Power Source:Corded Electric
- Wattage:120 watts
- Waterproof Rating:IP65
- Mounting Type:Under Canopy
- Color Temperature:3000 Kelvin
Our verdict“This light is best for growers in humid or under-canopy environments needing reliable full spectrum illumination.”
Spider Farmer SUPP-R30 660nm Deep Red Supplemental Light Bar, 23.6 inches
The SUPP-R30 is tailored for flowering and fruiting, with 88 high-density diodes emitting at 660nm, making it highly effective for boosting photosynthesis during bloom. While the Spider Farmer SUPP-UV60 & IR30 provides broader UV and IR support, this model zeroes in on deep red light, which is proven to enhance flowering. Its compact size and lightweight aluminum frame make it easy to install in small grow tents, but the 30W power output limits its effectiveness as a standalone light for larger grows. It’s best used as a supplement rather than the primary source, particularly for plants in flowering stages.
Pros:- High-density diodes for uniform deep red coverage
- Durable waterproof construction
- Supports flowering and fruiting stages
- Easy to install with a lightweight design
Cons:- Limited to deep red spectrum, not suitable for entire growth cycle
- Only 30W, may require extra lighting for vegetative stages
Best for: Growers needing targeted deep red light to accelerate flowering and increase yield in small or medium tents.
Not ideal for: Beginners or those looking for full spectrum lighting for all growth phases without additional sources.
- Light Source Type:LED
- Wattage:30 watts
- Number of Light Sources:88
- Beam Angle:120 degrees
- Material:Aluminum
- Warranty:5 years
Our verdict“This supplement is ideal for flowering-focused growers seeking to maximize yield with targeted deep red light.”
Spider Farmer SUPP-UV60 & IR30 LED Grow Light Bars Set 35.4″ (4-Bar)
The SUPP-UV60 & IR30 set offers four long bars with UV and IR diodes, designed to support flowering and fruiting stages over larger areas. Compared with the Spider Farmer SUPP-R30, which is more compact and targeted, this set provides a broader spectrum and higher wattage, making it suitable for larger grow tents or commercial setups. The 50,000-hour lifespan and app control add to its appeal, but the absence of waterproofing limits its use in humid environments. Its size and power make it a better choice for growers who need extensive coverage, though installation and energy consumption may be higher.
Pros:- High-density diodes for maximum light uniformity
- Extensive coverage with four bars
- Long lifespan and app control for convenience
- Durable aluminum and copper construction
Cons:- No waterproof rating, unsuitable for humid conditions
- Higher power consumption and installation complexity
Best for: Commercial growers or serious hobbyists seeking full spectrum, scalable lighting for larger grow tents.
Not ideal for: Small-scale growers or those with limited budgets, as the setup and energy costs are higher.
- Light Source Type:LED
- Number of Light Sources:4
- Power Source:Kabelgebunden
- Wattage:500 watts
- Length:35.4 inches
- Lifespan:50,000 hours
Our verdict“This comprehensive set is best for large-scale or professional growers needing full spectrum coverage with scalable setup options.”
Spider Farmer GlowR40 LED Plant Grow Light, 2ft Deep Red Supplemental Lighting Bar, 650-665NM, High Efficiency for Indoor Plants and Flowering
The Spider Farmer GlowR40 stands out for its specialized deep red spectrum, which is highly effective at promoting flowering and fruiting in indoor plants. Compared to the Mars Hydro ADlite UV30 & IR15 that combines UV and IR for broader growth stimulation, the GlowR40 focuses solely on the red spectrum, making it a more targeted tool for flowering stages. This specialization means it might underperform during vegetative growth, requiring additional lighting to cover all plant needs. Its waterproof, durable design makes it suitable for high humidity environments, and the digital timer offers automation—an advantage over simpler models. However, the need for mounting setup can be a challenge for beginners. This pick is ideal for growers seeking a dedicated, efficient flowering supplement, especially in humid setups.
Pros:- Highly efficient deep red spectrum promotes flowering and fruiting
- Waterproof and durable for high humidity environments
- Flexible installation options with daisy chain capability
- Digital timer for automated operation
Cons:- Limited to deep red spectrum, requiring additional lighting for full plant development
- Mounting setup may be complex for new users
Best for: Indoor gardeners focusing on flowering and fruiting stages who need a durable, automated red light solution
Not ideal for: Beginners or growers needing full-spectrum lighting for all growth phases, as this is specialized for flowering only
- Light Spectrum:650-665nm deep red
- Power:40 watts
- Light Source:LED
- Maximum Compatible Wattage:40 watts
- Number of Light Sources:2
- Waterproof Rating:IP65
- Item Dimensions:24.69″ L x 1.77″ W x 1.46″ H
- Material:Aluminum, Polycarbonate
Our verdict“This light is best suited for growers who want a dedicated, reliable red spectrum supplement for flowering stages in humid environments.”
Spider Farmer SUPP-R60 660nm Deep Red Supplemental Light Bars 35.4″ | 60W Red Grow Light with 176 Dense LEDs Array for Indoor Plants, Daisy Chain
The Spider Farmer SUPP-R60 offers a dense array of 176 LEDs focused on the 660nm spectrum, making it a powerful choice for supplementing main grow lights, especially when coverage needs to be extended. Unlike the GlowR40, which is a standalone fixture, the SUPP-R60’s daisy chain capability allows scalability across larger grow setups, ideal for more extensive indoor gardens. Its high-density LED array ensures uniform, intense light delivery, but as a supplemental light, it lacks the broad spectrum coverage necessary for vegetative growth. Constructed with durable, waterproof materials, it performs well in humid environments. The tradeoff is that it’s not suitable as a primary grow light, requiring additional full-spectrum fixtures. This product is perfect for advanced growers seeking scalable, focused red light support during flowering.
Pros:- Dense 176 LED array delivers intense, uniform red light
- Daisy chain capability allows expansion for larger grow areas
- Durable, waterproof construction suits humid environments
- Enhances flowering and fruiting with 660nm spectrum
Cons:- Limited to supplemental lighting, not suitable as primary source
- Requires additional full-spectrum lighting for vegetative growth
Best for: Experienced indoor growers needing to amplify flowering and fruiting with scalable, high-intensity red light
Not ideal for: Beginners or those seeking a full-spectrum primary grow light, since it only provides deep red supplementation
- Light Source:LED
- Power:60 watts
- Voltage:240 volts
- Number of Light Sources:2
- Dimensions:35.43″L x 1.21″W x 1.36″H
- Material:Aluminum
- Waterproof:Yes
Our verdict“This light excels for growers who need scalable, high-intensity red supplementation to boost flowering in large or multiple grow spaces.”
Mars Hydro ADlite UV30 & IR15 LED Grow Light for Indoor Plants, 3×3 ft Coverage
The Mars Hydro ADlite UV30 & IR15 combines UV and IR light to actively stimulate plant metabolism, making it a versatile option for growers aiming for faster flowering and healthier plants. Compared with the GlowR40 and SUPP-R60, which focus on red wavelengths, this model offers a broader spectrum that includes UV and IR, mimicking natural sunlight more closely. While this broad spectrum supports overall plant health, the UV and IR outputs require careful timing—using them during vegetative stages can be counterproductive. Its 3×3 ft coverage is suitable for small to medium grow tents but might be overkill for tiny setups. The need for suspension and compatibility with low-to-moderate wattage systems limits its use with high-wattage fixtures. This light is ideal for growers seeking to enhance metabolic activity and speed up flowering through broad-spectrum UV and IR stimulation.
Pros:- Includes UV and IR to stimulate plant metabolism and resilience
- Covers a 3×3 ft area effectively
- Simulates natural sunlight cycles for healthier growth
- Creates thermal effects that boost metabolic activity
Cons:- Requires careful timing to avoid UV/IR during vegetative stages
- Not suitable for small or low-wattage systems
- Suspension setup needed for optimal use
Best for: Intermediate to advanced growers aiming for faster flowering and improved plant health with full-spectrum UV and IR light
Not ideal for: Beginners or growers with small setups who prefer simple, low-wattage fixtures, due to its size and complexity
- Light Source Type:LED
- Power Source:Corded Electric
- Mounting Type:Bracket Mount
- Light Source Features:UV30 & IR15 LED
- Number of Light Sources:3
- Item Dimensions:25.98″L x 4.72″W x 4.13″H
- Material:Aluminum
Our verdict“This model is best for growers who want a full-spectrum light to promote faster flowering and overall plant vitality, especially in mid-sized grow areas.”
How We Picked
These products were selected based on a combination of performance, build quality, coverage area, spectrum quality, and user reviews. Priority was given to models that deliver consistent light intensity, durability, and energy efficiency. We also considered ease of use features such as dimming and waterproofing, which enhance practicality. The ranking reflects a balance of value and performance, aiming to help growers find options suited to different budgets and needs.
| far red grow light bar | Material | Power Source |
|---|---|---|
| Spider Farmer SUPP-UV30 & IR16 | Aluminum and metal | — |
| Mars Hydro ADlite UV55 & IR30 | Aluminum | Corded Electric |
| RDJ Bouns Under Canopy LED Gro | — | Corded Electric |
| Spider Farmer SUPP-R30 660nm D | Aluminum | — |
| Spider Farmer SUPP-UV60 & IR30 | — | Kabelgebunden |
| Spider Farmer GlowR40 LED Plan | Aluminum, Polycarbonate | — |
| Spider Farmer SUPP-R60 660nm D | Aluminum | — |
| Mars Hydro ADlite UV30 & IR15 | Aluminum | Corded Electric |
Factors to Consider When Choosing Far Red Grow Light Bars
Choosing the right far red grow light bar involves understanding key factors that influence plant health and overall grow space efficiency. Beyond basic wattage, consider spectrum quality, coverage, and build features. Making the right choice ensures you get the most from your investment and support healthy flowering and vegetative growth.Spectrum Quality and Balance
Far red light at 660nm is vital for flowering, but pairing it with other spectrums like UV, IR, and full-spectrum white light can improve overall plant health. A well-balanced spectrum supports both vegetative growth and flowering, preventing issues like stretch or weak stems. Be cautious of models that focus solely on red or IR, as they may lead to unbalanced growth or reduced photosynthesis efficiency.
Coverage Area and Intensity
Matching your grow space with the light’s coverage ensures uniform plant development. Larger coverage bars, like the Mars Hydro ADlite, are ideal for bigger setups but tend to cost more. Remember, higher intensity doesn’t always mean better; it’s about delivering consistent, even light without causing heat stress. Consider how many plants you want to support and choose accordingly.
Build Quality and Durability
Opt for models with sturdy construction, good heat dissipation, and waterproof features if you plan to use them in humid environments. Cheaper models may save money upfront but could fail prematurely or require frequent replacements. A well-made bar with reliable components ensures long-term operation and better value over time.
Ease of Use and Features
Features like dimming, daisy chaining, and adjustable mounting options add convenience and flexibility. Dimming allows you to fine-tune light intensity based on plant stage, while daisy chaining simplifies setup for multiple bars. However, these features often come at a higher price, so consider how much you need them versus your budget.
Energy Efficiency and Cost
LED technology continues to improve, meaning more efficient models can reduce electricity bills. While high-efficiency lights might cost more initially, they save money over time through lower power consumption. Be wary of overly cheap options that may promise high output but lack efficiency or durability, leading to higher operational costs.
Frequently Asked Questions
Can I use far red grow light bars for flowering stage only?
While far red light at 660nm is especially effective during flowering to promote blooming, using these bars exclusively for flowering can lead to unbalanced growth if plants haven’t developed strong vegetative health yet. For best results, incorporate a full spectrum or white light during vegetative stages and switch to far red for flowering. This approach ensures healthy development throughout all growth phases.
How many watts do I need for a 4×4 ft grow space?
For a 4×4 ft area, around 40-60 watts of high-quality LED grow light power per square foot is recommended. Far red bars with total wattage in this range can effectively support flowering, but coverage is equally important. Select a model with sufficient PAR output and even distribution to ensure uniform light across the entire space.
Are waterproof features necessary for indoor grow lights?
Waterproofing is beneficial if your grow space has high humidity or if you plan to water plants under or near the lights. It adds durability and reduces risk of electrical issues. However, waterproof models tend to cost more, so if your setup is dry and controlled, a standard model without waterproof features may suffice. Evaluate your environment before paying extra for waterproofing.
Is a dimmable far red grow light worth the extra cost?
Dimming features provide more control over light intensity, which can optimize plant growth stages and prevent light stress. If you grow multiple types of plants or want to fine-tune your setup, investing in a dimmable model makes sense. For simple setups or beginner growers, non-dimmable lights might be adequate, but the added flexibility often justifies the higher price.
Should I prioritize coverage area or spectrum quality?
Both are important, but the priority depends on your grow space and goals. For larger areas, coverage area and intensity are critical to ensure uniform light distribution. For specific flowering or high-value plants, spectrum quality at the right wavelengths can make a bigger difference in yield and plant health. Ideally, choose a model that balances both for versatile, effective lighting.
Conclusion
For growers seeking the best all-around performer, the Spider Farmer SUPP-UV60 & IR30 offers a balanced spectrum and solid build quality. If coverage and larger areas are your priority, the Mars Hydro ADlite UV55 & IR30 makes sense despite its higher price. Beginners or small-scale growers might prefer simpler, budget-friendly options like the RDJ Bouns Under Canopy LED Bar. For those focused on flowering, the deep red models like the Spider Farmer SUPP-R60 provide targeted wavelengths at a good price point. Ultimately, your choice depends on your grow space size, budget, and specific plant needs.
Halloween Picks
halloween
As an affiliate, we earn on qualifying purchases.
