After years of experimenting with different indoor growing systems, from my 60×60 grow tent to Kratky hydroponic setups and microgreens trays, I have learned that complete grow kits appeal to a specific grower profile: someone who wants everything pre-matched and ready to plug in, without the research burden of sourcing components separately. The Vivosun Grow Tent Kit promises exactly that. At under $400, it includes the tent, light, fan, filter, ducting, and monitoring equipment. But does a bundled system sacrifice quality to hit that price point? Here is a breakdown of each component, how it compares to Mars Hydro, and who this kit actually suits.
What’s in a Vivosun Grow Tent Kit?
The standard Vivosun kit ships with everything you need to set up a contained grow environment on day one. Here is what arrives in the box:
- VS4000 LED grow light (400W actual draw)
- Grow tent (4x4x80″ in the standard kit)
- 6″ inline duct fan with speed controller
- Activated carbon filter (6″ diameter)
- Flexible aluminum ducting (6 feet)
- Adjustable rope hangers (for light)
- UV-protection grow room glasses
- Humidity and temperature monitor
This bundled approach saves you the headache of compatibility checks. The fan diameter matches the filter and ducting. The light coverage is designed for the tent’s footprint. The rope hangers support the light’s weight. You are not mixing incompatible adapters or connecting components that were never designed to work together.
The trade-off is that you are buying an integrated system where each component is adequate but rarely the absolute best in its category at that price. For beginners or growers who prioritize simplicity over optimization, that is often the right call.
The Grow Tent: Sizes, Materials, and Build
The tent is the foundation of the whole setup. If it leaks light, traps humidity, or develops tears early, the entire system underperforms. Vivosun tents are available in several configurations. The 4x4x80″ is the most common in their bundled kits, and the focus of this review.
Canvas and Frame: What 600D Fabric Means in Practice
Vivosun uses 600-denier canvas with a 0.8mm mylar backing rated at 98% reflectivity. Denier measures yarn weight: higher denier means stronger, more durable fabric. The 600D rating puts Vivosun in the mid-range. Budget tents use 420D, which is thinner and more prone to tearing. Premium builds use 1680D, which is significantly heavier. Vivosun sits comfortably in the middle tier.
In practical terms, 600D canvas holds up well to regular assembly, disassembly, and the mechanical stress of hanging equipment inside. The double-stitched seams do not split at corners or zipper stress points under moderate use. The steel frame uses metal connectors at each joint, providing enough rigidity to support a full setup including the light, fan, and carbon filter without sagging.
Light Proofing and the Zipper Question
Light proofing matters most for photoperiod plants, which flower based on uninterrupted dark periods. A single light leak hitting a photoperiod plant during its dark phase can delay flowering or cause stress. Autoflowering varieties are unaffected by light during their dark period, making this concern irrelevant for that crop type.
Vivosun addresses light proofing with a double-layer black liner behind the zipper seam, and the canvas itself is fully light-proof when new. Fresh zippers glide smoothly and maintain their seal through the first several months of use.
The issue that appears consistently in long-term forum reports is zipper wear. After six to twelve months of regular opening and closing, pinhole light leaks can develop along the seam where the zipper meets the canvas edge. This is a wear pattern, not a manufacturing defect, and it is common across most tents in this price range. Growers handling zippers carefully, avoiding snags, and zipping at low tension minimize this significantly. For photoperiod-heavy growers who need long-term precision, a roll of black fabric tape kept nearby handles any developing leaks quickly.
The LED Grow Light: VS4000 Performance
The VS4000 is the strongest component in the kit. It is a 400W actual draw full-spectrum LED using Samsung LM301 diodes, a proven technology found in grow lights across multiple price tiers. The efficiency rating is 2.9 umol/J (micromoles per joule), which is competitive for a light at this price point. Vivosun backs it with a five-year manufacturer’s warranty.
Light Output and Coverage for Your Tent Size
At 400W with Samsung LM301 diodes, the VS4000 delivers sufficient intensity for flowering in a 4×4 tent and vegetative growth across a 5×5 area. The full spectrum covers both blue and red wavelengths needed across all growth stages. A dimming dial lets you set intensity from around 20% to 100%, which is useful for seedling stages when full intensity would stress young plants.
Hanging height matters. At 24 inches above the canopy, the VS4000 delivers flowering-grade intensity across most of the 4×4 tent floor. At 36 inches, intensity drops to levels more appropriate for vegetative growth. This flexibility means you can use one light across the full lifecycle without adding supplemental fixtures.
The light runs warm. The panel surface reaches 110 to 120F during an 18-hour photoperiod, which is normal for a 400W LED at this wattage. This thermal load means tent temperature rises without adequate ventilation, making the included fan a functional necessity rather than an optional add-on.
Ventilation: Inline Fan, Carbon Filter, and Ducting
The Vivosun kit includes a 6″ inline duct fan rated at approximately 400 CFM (cubic feet per minute), paired with a matching 6″ activated carbon filter and six feet of flexible aluminum ducting. A standard 4x4x80″ tent holds roughly 107 cubic feet of air. The 400 CFM fan cycles that volume three to four times per minute at full speed, well within the recommended two to eight air exchanges per minute for healthy indoor gardens.
The speed controller is a simple dial rather than a smart digital controller. You set fan speed manually, which most hobby growers find adequate. Seasonal adjustment is straightforward: higher speed in summer, lower in winter. For growers who want automated climate response, that requires a separate controller upgrade, but the Vivosun fan is compatible with third-party speed controllers.
The ducting is flexible aluminum. Keep bends gradual to avoid airflow restriction. The six-foot length suits most closet or dedicated room setups, though routing through walls or into attic spaces may require additional ducting purchased separately.
Odor Control: Does the Included Carbon Filter Actually Work?
The activated carbon filter included in the Vivosun kit absorbs odor molecules as exhaust air passes through the carbon bed. This process works effectively for the first six to eight months of continuous operation, which is the typical service life for a 6″ activated carbon filter running daily. After that point, the carbon becomes saturated and odor control degrades noticeably.
The filter performs best when the inline fan pulls air through it (not pushes). The kit diagram shows the correct orientation, but it is worth double-checking before first use. A reversed filter passes air around the carbon bed rather than through it, defeating the purpose entirely.
For vegetable, herb, and fruit grows, the included filter is fully sufficient. Replacement filters cost $30 to $50 and install in minutes.
Setting Up the Kit: What the First Hour Looks Like
Vivosun kit assembly follows a logical sequence. The tent frame clicks together without tools in 20 to 30 minutes. Canvas zips over the assembled frame from the base. Light rails install at the top of the frame, and the VS4000 hangs from rope ratchets that allow height adjustment without tools.
The carbon filter mounts to the top crossbar using the included straps, with ducting connecting the filter output to the inline fan and routing exhaust out through one of the tent’s upper duct ports. Confirm that the fan is drawing air through the filter (filter first, then fan, then exhaust ducting). This is the single step most new growers get backwards.
With everything hung and connected, plug the light into a timer (not included in the kit), set the fan to medium speed, and start the light at 50% intensity for the first week. The humidity monitor clips inside the tent near mid-canopy to give a consistent reading.
Total setup time for a first-time grower following the manual: 60 to 90 minutes. For someone familiar with grow tent setups, 30 to 40 minutes is realistic.
Vivosun Grow Tent Kit vs. Mars Hydro: Key Differences
Mars Hydro and Vivosun occupy the same price range for complete bundled kits. Both target first-time growers, and both include tent, light, fan, filter, and ducting. The differences are meaningful but not dramatic.
| Feature | Vivosun Kit (4×4) | Mars Hydro Kit (4×4) |
|---|---|---|
| Tent canvas | 600D, 0.8mm | 1680D, double-stitched |
| Interior reflectivity | 98% mylar | Diamond pattern mylar |
| LED diodes | Samsung LM301 | Epistar or Samsung (varies by model) |
| LED actual wattage (kit light) | 400W (VS4000) | 200-300W (TSW2000 in equivalent bracket) |
| LED warranty | 5 years | 3 years |
| Fan controller | Dial speed controller | Dial speed controller |
| Price range | $300-$400 | $300-$400 |
Mars Hydro’s 1680D canvas is substantially heavier than Vivosun’s 600D. Growers who plan to move the tent frequently, assemble and disassemble it for multiple grow cycles over several years, or operate in environments where the tent takes physical stress will find Mars Hydro’s canvas holds up better long-term.
Vivosun’s advantage is in the light. At 400W actual draw for the VS4000, the kit delivers more light output than most Mars Hydro kit lights in the equivalent price bracket, where the TSW2000 commonly ships at 200 to 300W actual. More light in a 4×4 tent means higher potential yields at the flowering stage.
The five-year light warranty from Vivosun versus Mars Hydro’s three-year warranty is a meaningful differentiator for a component that costs $200 or more to replace independently.
Who Should Buy the Vivosun Kit (and Who Should Look Elsewhere)
The Vivosun kit is well matched for growers who want a complete indoor grow setup without researching component compatibility. Everything arrives in one order, at one price, and the components are sized to work together. For first-time growers, this removes a significant planning burden.
It is also a solid choice for growing vegetables, herbs, salad greens, and other crops where photoperiod light-cycle precision is not critical. Autoflowering plant varieties are similarly unaffected by the zipper concern. In these scenarios, the Vivosun kit offers genuine value at its price point.
Growers who should look at alternatives:
- Those running long-term photoperiod grows requiring absolute light sealing from month one through year two or beyond. The zipper wear issue is manageable but real.
- Growers who want the flexibility to choose their own light (a separate light purchase lets you specify wattage, brand, and driver quality independently of the tent).
- Those who want a smarter climate controller from the start. Neither the Vivosun nor Mars Hydro kits include one; adding an AC Infinity grow tent to your research is worthwhile if climate automation is a priority from day one.
For a deeper look at the tent component alone, separate from the bundled kit, the Vivosun standalone tent review covers build quality in more detail against other tent-only options.
The full landscape of complete grow tent kits at this price tier is worth reviewing if you want to compare beyond these two brands before committing.
Frequently Asked Questions
Is the Vivosun kit sufficient for a first grow?
Yes. The kit covers every core system: containment, lighting, ventilation, and odor control. You will need growing medium, containers, nutrients, seeds or clones, a light timer, and a pH meter separately. Budget an additional $50 to $100 for consumables before your first grow cycle.
What size options does the Vivosun grow tent kit come in?
Vivosun sells kit bundles in 2×4, 4×4, and 5×5 configurations, along with some intermediate sizes. The 4×4 kit is the most widely reviewed and the most common starting point for hobby growers with a medium-sized grow space.
Can you use the VS4000 outside the Vivosun kit in a different tent?
Yes. The VS4000 is a standalone product sold separately from the kit. If you already own a tent and only need the light, you can purchase the VS4000 independently. At 400W actual with Samsung LM301 diodes, it covers a 4×4 flowering footprint regardless of what tent surrounds it.
How often does the carbon filter need replacing?
Plan to replace the activated carbon filter every six to eight months under continuous use. After that point, the carbon bed is saturated and odor control drops noticeably. Replacement filters sized for a 6″ flange connection cost $30 to $50 and swap out in minutes.
Does the Vivosun kit include a light timer?
No. A timer for the light is not included in the standard kit. You need a mechanical or digital outlet timer to automate the light cycle. A basic 24-hour mechanical outlet timer costs around $10 and handles standard 18/6 or 12/12 light schedules reliably.
Is the VS4000 suitable for growing herbs and vegetables, not just cannabis?
The VS4000’s full-spectrum output supports any photosynthetic plant. Basil, lettuce, cherry tomatoes, peppers, and culinary herbs all thrive under its light at the recommended intensity levels. Many growers use the Vivosun kit year-round for food production entirely separate from other crop types.