With thousands of units sold the 400 Plus model is the perfect light to replace your 800-1000 watt MH / HPS bulbs. 440 Watt Patent Pending Full Spectrum LED Grow Light made in the USA. Can be used for both vegetative and FLOWER growth. Perfect for plants that are particularly sensitive while only using a fraction of the energy. Nationwide compliant The Spectrum King 400+ LED Grow Light Covers 16 Sq ft during flower ( 4×4 ft ), and 34 Sq ft for Veg, larger than any other LED Grow Light. Safety Certified and IP65 Rated. With water resistant housing the 400+ LED Grow Light perfect for wet and humid environments. Guaranteed to lower your overall ambient room temperature. Comes with Dual Warranty: Spectrum King 400+ LED Grow Light is guaranteed to maintain 90% or better light output for 3 YEARS* with regular use plus a 5 YEAR Mechanical warranty on all parts and labor.
You can choose to add a manual dimmer which enables turning the power down to as low as 10% power for more control when needed.
Main Specifications and Intended Uses for 340W, 680W, 840W, and 1050W LED Grow Lights
The next generation of high-powered LED grow lights comes in a variety of wattages to suit every stage of your plant’s life cycle and garden size:
340W LED Grow Lights Ideal for vigorous vegetative growth, 340W LEDs are designed to provide even light distribution and optimal blue spectrum intensity—perfect for leafy greens, herbs, and seedling starts. These fixtures typically cover 3′×5′ for veg, offering excellent energy efficiency and coverage for small to mid-sized spaces.
680W LED Grow Lights Stepping up to 680W models, you’ll find a robust balance of intensity and spectrum output that’s great for both veg and flower stages. These units are perfect for growers seeking to replace traditional 1000W HPS lamps, covering up to 5′×5′ for flowering and even larger footprints in veg. Expect consistent PAR outputs, passively cooled designs, and spectrum balance to support fruiting and flowering crops.
840W LED Grow Lights Looking to push the envelope? 840W LEDs are engineered for demanding grows and photon-hungry species—think big fruiting plants or commercial canopies. Most models offer full-spectrum output, covering 6′×6′ for flowering and even larger for vegetative growth, while maintaining high uniformity and deep canopy penetration.
1050W LED Grow Lights When you need to maximize yields and light saturation for the largest indoor grow spaces, 1050W lights stand at the top. Designed for extensive footprints (7′×7′ or more during veg), these units offer very high output, advanced dimming, and fine-tuned spectrum options to support every stage from clone to harvest in commercial-scale or enthusiast gardens.
All these lights commonly come with:
Full spectrum output for both vegetative and flowering growth
Safety certifications and ratings suitable for damp environments
Dimmable options for customizable light intensity
Coverage areas clearly stated for each wattage/tier
Low-heat designs that help control room temperatures and energy efficiency
Choosing the right wattage ensures the best results for your grow, whether you’re caring for sensitive seedlings or maximizing yields from mature plants.
