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Spectrum King

Spectrum King SK403 460W LED Grow Light

$799 $699

Bulk/wholesale pricing available for this product:
call us or email us for volume quote.



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For Orders Over 99$

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Highly reflective and effective 460W Full Spectrum LED Grow Light. Light spectrum patent No. 10238043, made in the USA. 

Perfect for plants that are particularly sensitive while only using a fraction of the energy.

Can be used for both vegetative and flower growth.

Dual warranty of 3 years for 90% or better of original light output and 5 years on parts and labor.

  • Full-spectrum 460 Watt LED light made in the USA.
  • Designed for smaller grow sites and sensitive plants
  • Water-resistant housing perfect for wet and humid environments
  • Safe for outdoor use.
  • Comes with  RJ12 connector
  • Great for supplemental Greenhouse lighting.


  • Item Number – SK403
  • Light Source – LED
  • Input Voltage – 110V-277V (480V Optional) AC
  • Frequency Range – 50~60Hz
  • Power Consumption – 460W
  • Amperage Draw - @ 120V – 3.8 A @240V – 1.9 A @480V – 0.53 A
  • Recommended Cooling BTUs– 1,570
    • Ideal Replacement– 1000W HPS Single Ended Bulb
    • Lumens - 62,080.9
    • Lifespan - >50,000 Hrs
    • Light Beam Angle - 120 Degree
    • PPF - 973.6
    • BPF - 1055.7
    • Umol/J - 2.1

    • Body Case Material– Die Cast Aluminum
    • Product Size - 11”L x 10”W x 9.5”H
    • Product Weight - 14 lbs (6kg)

    • Suitable Distance Over Canopy   Veg: 36” - 48“  Flower: 18” - 24”
    • Coverage Area  – Veg: Up to 6’ x 6’  Flower: 4’ x 4’
Free, Fast Local Shipping

All continental US orders over $99 qualify for free shipping.

Discreet Shipping

We understand the importance of privacy to many of our customers. All orders placed on Growbuds are shipped in plain boxes without explicit identifying marks.

Estimated Arrival

Between 1 and 5 business days, depending on your location.

Easy Returns

For up to 90 days, depending on the brand.


Please refer to our Shipping & Returns policy page for more detailed information.

All products sold on Growbuds are subject to the respective manufacturer’s warranty policy, which can be found on manufacturers websites or by contacting them. If your product fails in the remainder of our returns period, the manufacturer's warranty policy will prevail. In this case, send us an email at support@wegrowbuds.co and we will assist you in your warranty claim by helping you coordinate with the original manufacturer.

Our experienced commercial team has helped supply hundreds of indoor, outdoor and commercial greenhouses projects in Canada and the United States.

Looking to get a quick quote? Contact us at support@wegrowbuds.co or call at 1-877-900-2632 option 2 to talk with a Growbuds sales representative. Otherwise please fill out the quick form below and we will be in touch as soon as possible.

United States Headquarters

2915 Ogletown Road
Newark, DE 19713, United States

Canada Headquarters

295 Cure-Labelle Boulevard,
Laval, QC H7L 2Z9, Canada

Call Us

Toll Free: 1-877-900-2632
Hours: 9AM - 5:00PM EST

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You may be wondering why you should buy your grow lights from us, instead of other available authorized dealers. Read on for the answers to all your burning questions.

10 Reasons To Trust Growbuds With Your Business

Customer Service

We are here to help and want the best for you. Use our live chat, email us at support@wegrowbuds.co or call us at 1-877-900-2632 during business hours. We are always here for you.

Full Warranties and Generous Return Policies

We only carry top American brands that back their products with full warranties and return policies of up to 90 days, depending on the brand.

Earn Growbuds Points

Earn points on all your purchase and save big on your next purchases. You'll earn 4 "Nugs" for every dollar your spend. You can then use your "Nugs" to save on your next grow room upgrades. Get started by creating a free account today.

Price Match

We want you to be absolutely secure that you're getting the best price with us, so we will not only match a lower price you find online before purchase, but will even refund you the difference up to a month after purchase.

Discreet Insured Shipping

All orders ship via FedEx, UPS, and USPS, or a reputable freight company and the shipment is always insured, so you do not have to worry about a lost or damaged package. You also don't need to worry about prying eyes: all orders ship discreetly.

Hassle-Free Returns

For up to 90 days, please refer to our Shipping & Returns policy page for more information.

Free Shipping

On orders over $99 to the lower 48 states.

No Sales Tax Anywhere

Except for MI, and CA for some brands.

Authorized Dealers

We only carry American brands whose lights and other products have been extensively tested by real growers and processors. 100% US warranty on all products.

Safe & Secure Systems

In place for every payment transaction.

Frequently Asked Questions

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Free Fast US Delivery
For Orders Over 99$

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