KINGLED KP4000 LED Grow Lights
$129.99 price checked August 2026
If you need to cover a 5×5 ft grow tent, this 400w light is the right choice to price-check.
Where the KINGLED KP4000 Fits
The KINGLED KP4000 LED Grow Light is for indoor growers requiring a 400w output to cover a 5×5 ft area, providing a full spectrum for both vegetative and flowering stages.
Inconsistent light distribution often leads to “dead zones” where plants fail to thrive or show stunted growth due to low PPFD at the canopy center. Proper light placement and intensity are necessary to ensure every plant receives the energy required for consistent development.
The KINGLED KP4000 provides a 400w power output designed to eliminate these gaps by covering a 5×5 ft area. It utilizes 2304 LEDs to deliver a full spectrum including 660 nm red light and 460 nm blue light for balanced growth.
We evaluated the KINGLED KP4000 against the other grow light options we compared for this category. This review is for buyers who need a reliable, high-output fixture for large indoor spaces or hydroponic setups.
How Green Writer picked: we started from the 200 most-reviewed grow light listings in our retail dataset, removed duplicates, accessories and off-category products, and 89 qualified. This product is one of 15 from that pool chosen for a full review. Our scores blend buyer satisfaction (60%), price position against comparable products (25%) and rating volume (15%). Specifications come from manufacturer listings and ratings from verified Amazon buyer reviews (data checked August 2026).
The Short Answer on the KINGLED KP4000
Best for: you need a full-spectrum light that covers a 5×5 ft area for indoor plants or hydroponic setups.
The KINGLED KP4000 is a reliable choice at the $129.99 price point.
- Pro: The 400w power output provides the wattage required to meet the 300W per fixture threshold for a 3x3ft canopy.
- Pro: It includes three distinct modes—Veg, Bloom, and Veg & Bloom—to adjust the light for different growth stages.
- Pro: The 2304 LEDs provide a high PAR output with a specific 660 nm red and 460 nm blue light spectrum.
- Con: The 400w output does not reach the 900 µmol/m²/s threshold required for high-intensity industrial fruit production.
- Con: The 5×5 ft coverage area limits the fixture to smaller grow tents and prevents use in large-scale commercial greenhouses.
Don’t buy this if: you require a light that produces over 900 µmol/m²/s for professional-grade flowering and fruit production.
Price assessment: At $129.99, this fixture offers a fair price for a 400w light with 10,000 lumen maintenance.
Green Writer score: 8.5/10 (data-driven – see “How we picked” above)
You may also want to see our roundup of the best LED grow light for seed starting to find the perfect early-stage setup.
The Specifications That Matter
| Light Source Wattage | 400 Watts |
| Light Output Maximum | 84600 Lumens |
| Coverage Area | 5×5 ft or 4×4 ft |
| Color Temperature | 3000k to 5000k |
| LED Count | 2304 LEDs |
| Voltage | 110 Volts |
| Material | Aluminum |
The 400 Watts power consumption meets the 300W per fixture threshold required to provide sufficient PPFD for a 3x3ft canopy during the flowering stage.
Where this sits in the buyer data: Among the 89 products screened for this category, this one’s 4.5 rating places it #24, on 5,341 ratings – above the 456-rating median of that group, so the average rests on more feedback than most of its comparables. On price it undercuts 60 of them.
Before You Buy: KINGLED KP4000 Checklist
The first thing to check is whether your grow space can accommodate the 400W power consumption of the KINGLED KP4000.
- ☐ Confirm your tent dimensions match the 5×5 ft or 4×4 ft coverage area
- ☐ Verify your power supply can support 400 watts of continuous draw
- ☐ Measure the hanging point clearance for the KINGLED KP4000 frame
- ☐ Check that your ventilation can exhaust the heat produced by 400w of power
- ☐ Budget for the specific wiring requirements of a 400w LED grow light
You should not buy this product if your grow area is larger than 5×5 ft, as the light distribution will not provide sufficient PPFD at the canopy center for larger spaces.
Performance: What the Specs Deliver
Full Spectrum Light Distribution
The KINGLED KP4000 provides a full spectrum of light including 460 nm blue light, 660 nm red light, and 3000k to 5000k white light. This specific spectral range supports the various needs of different plant life cycles, from early vegetative growth to the flowering stage. By providing these specific wavelengths, the fixture helps you avoid spectral imbalance, which can lead to stretching or poor fruit set.
You can expect the light to maintain its intensity over time because the KINGLED KP4000 is rated for 10,000 hours of lumen maintenance. This rating indicates the fixture is designed to resist the dimming associated with LED degradation over long-term use. If you require a specific PAR value for your setup, check the manufacturer’s documentation for the exact output at your desired distance, as lumen maintenance refers to the longevity of the diodes.
Multi-Stage Growth Modes
The KINGLED KP4000 features three distinct modes: Veg, Bloom, and Veg & Bloom. These settings allow you to switch the light’s output to prioritize the specific wavelengths needed for different growth stages. Use the Veg mode to focus on foliage development or the Bloom mode to encourage flowering and fruit production.
Having these dedicated modes helps you manage the transition between growth phases without needing to swap fixtures. Because the unit supports both stages simultaneously in the Veg & Bloom mode, you can maintain a consistent environment for plants that require a mixed spectrum throughout their entire life cycle.
Large Coverage Area
The KINGLED KP4000 is designed to provide a 5×5 ft coverage area. This footprint allows you to provide consistent light across a larger canopy, which helps prevent low PPFD at the canopy center and reduces the risk of creating “hot spots” or dead zones in your grow tent. The 400w power output is intended to distribute across this 5×5 ft space to ensure even light penetration.
If you are concerned about light uniformity at the edges of your tent, verify the manufacturer’s beam angle and throw distance. While the 5×5 ft coverage area defines the intended reach, you should confirm that the fixture provides sufficient PPFD for your specific crop’s requirements at the furthest corners of your canopy.
How the KINGLED KP4000 Compares to Alternatives
The KINGLED KP4000 provides the highest power output at 400w, which exceeds the 300w per fixture threshold required to provide sufficient PPFD for a 3x3ft canopy during the flowering stage.
- The KINGLED KP4000 costs the same price as the Spider Farmer SF2000 200W LED Grow Light, but provides 400w of power compared to 200w.
- The KINGLED KP4000 features 2304 LEDs, which is a higher count than the 1620 LEDs on the KINGLED KP3000.
- The KINGLED KP4000 offers a 5×5 ft coverage area, outperforming the 4×4 ft coverage area of the Kingled KP2000.
- The Kingled KP2000 provides 6680 lumen maintenance, while the KINGLED KP4000 reaches 10000 lumen maintenance.
- The KINGLED KP4000 has 256 red LEDs and 256 blue LEDs, while the KingLED KP1500 contains only 864 total LEDs.
- The VIPARSPECTRA XS3000 Pro Grow Light has a 4.7 rating, which is higher than the 4.5 rating of the KINGLED KP4000.
The KINGLED KP4000 provides a full spectrum with 460 nm blue light and 660 nm red light. While it lacks the specific optical lens design of the VIPARSPECTRA XS3000 Pro Grow Light, the 400w output and 10000 lumen maintenance ensure it provides high-intensity light for flowering.
If you require specialized optical lenses for uniform PPFD distribution, choose the VIPARSPECTRA XS3000 Pro Grow Light instead of the KINGLED KP4000.
For a more compact alternative, see our full VIPARSPECTRA XS1500 review for detailed performance data.
The KINGLED KP4000: Remaining Questions
How much does it cost to run the KINGLED KP4000 LED Grow Light?
Operating costs depend on your local electricity rates, but the KINGLED KP4000 draws 400 watts of power.
Does the KINGLED KP4000 have a dimmer?
The KINGLED KP4000 features adjustable light intensity rather than a fixed 400w output. This allows you to lower the power for seedlings or different growth stages to prevent heat stress or light burn.
What is the coverage area for the KINGLED KP4000?
The KINGLED KP4000 covers a 5×5 ft or 4×4 ft area, which meets the standard requirements for medium-sized grow tents. This footprint ensures the 400w output provides sufficient light distribution for the canopy.
Is the KINGLED KP4000 suitable for hydroponics?
Yes, the KINGLED KP4000 is compatible with hydroponics and indoor plant setups. The full spectrum output, including 660 nm red and 460 nm blue light, supports the photosynthesis requirements for water-based growing systems.
To understand how different technologies work, view the various types of grow lights explained in our technical guide.
Is the KINGLED KP4000 Right for You?
The KINGLED KP4000 suits 5 kinds of buyer and is the wrong choice for 3 jobs, listed below with the reason for each.
Who the KINGLED KP4000 is for, and what it does well
Who the KINGLED KP4000 suits
- Home cannabis growers — the 400w power and 4×4 ft coverage area provide sufficient intensity for a standard home tent setup
- Hydroponic hobbyists — the compatibility with hydroponics and high PAR output support water-based nutrient delivery systems
- Indoor ornamental plant collectors — the full spectrum and 3000k to 5000k white light mimic natural conditions for foliage health
- Small-scale boutique farmers — the 400w output and 5×5 ft coverage allow for high-density production of fruiting crops
- Urban apartment gardeners — the adjustable light intensity allows for flexible placement in limited living spaces
What the KINGLED KP4000 handles well
- Growing flowering crops — the Bloom mode and 660 nm red light optimize flower and fruit development
- Vegetative plant expansion — the Veg mode and 460 nm blue light promote leafy growth and stem strength
- High-density indoor farming — the 2304 LEDs and 400w power output provide high PAR for dense canopies
- Mixed-stage cultivation — the Veg & Bloom mode allows for simultaneous growth and flowering stages
- Small-scale greenhouse setups — the 5×5 ft coverage area fits standard small-scale propagation spaces
What the KINGLED KP4000 is the wrong choice for
- Large-scale commercial greenhouses — the 400w power output is insufficient for industrial-scale acreage
- High-ceiling warehouse farming — the 5×5 ft coverage area limits the light’s reach in large open spaces
- Extreme high-intensity light requirements — the 400w limit may not provide enough punch for massive, heavy-fruiting trees
What to budget alongside the KINGLED KP4000, and what to skip
Worth buying at the same time
- Grow tent — the 4×4 ft and 5×5 ft coverage specs imply a need for a contained growing environment
- Power strip — the 400 watts power consumption requires a reliable electrical source
- Ventilation fan — the 400w power output generates heat that needs to be managed in a grow tent
- Hanging mount — the 400w light requires a secure way to be positioned over the 5×5 ft area
- Nutrient solution — the compatibility with hydroponics implies a need for liquid fertilizers
What you can skip
- Separate blue and red bulbs — the full spectrum and 2304 LEDs already include specific red and blue diodes
- Color-changing smart bulbs — the dedicated Veg, Bloom, and Veg & Bloom modes provide specific spectrums that standard bulbs can’t replicate
Where to Buy the KINGLED KP4000
These retailers sell Grow Light generally – we do not track which of them has this particular model in stock, so check availability and the current price with the retailer before making a trip.
- HydroHouse (online only) — specialist retailer for hydroponic and grow light systems
- eBay (online only) — source for open-box and refurbished grow lighting units
- Amazon (online and physical stores) — wide selection of brands and fast shipping
- Home Depot (online and physical stores) — physical locations for large-scale lighting and hardware
- Lowe’s (online and physical stores) — in-store availability for basic grow lighting and supplies
- Bloomz (online only) — specialist retailer with expert staff and niche brands
Final Verdict on the KINGLED KP4000
You need a high-output light capable of covering a 5×5 ft area while providing a full spectrum for both vegetative and flowering stages. The KINGLED KP4000 is the right choice for these requirements at a price of around $129.99.
The KINGLED KP4000 provides a 400w power output and features a 4.5 rating from 5,341 buyers, providing a high level of reliability for home growers.
Skip it if: You require a light for a canopy larger than 5×5 ft or need a specialized fixture with the Samsung LM301H diodes used in industrial horticulture.