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Free Shipping on most orders over $175 | Sales Tax in NJ only
Free Shipping on most orders over $175 | Sales Tax in NJ only
California Lightworks SolarXtreme 640 LED grow light angled right view showing foldable bar design and full spectrum coverage for indoor plant growth.

California Lightworks SolarXtreme 640 Full Spectrum LED Grow Light

by California Lightworks
Save $192.00 Save $192.00
$641.00
$641.00 - $641.00
$641.00
$449.00
$449.00 - $449.00
$449.00

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Energy Rebates & Bulk Pricing Available

SAVE BIG! Contact us for Bulk Pricing and Rebate Eligibility, or call us at (973) 206-7590.

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Get an additional 3% off when you pay by ACH, Money, or Zelle. Select your option at check out.

We accept all major credit cards, crypto and Paypal 0% credit plans. More details here.

Full Manufacturer’s Warranty

You buy it, we back it! Your purchase is fully covered with a manufacturer’s warranty. More details here.

Delivers 1792 μmol/s full-spectrum light with 2.8 μmol/J efficiency, ideal for 4x4 grows with premium diode quality.

The SolarXtreme 640 is built for serious growers who demand powerful performance and long-term reliability. Covering up to a 4’ x 4’ space, it delivers a high 1792 μmol/s output with a strong PPE of 2.8 μmol/J. Backed by premium LUMILEDS diodes, this full-spectrum fixture fuels every stage from veg through flower with consistent intensity. For tent growers and mid-size commercial setups, it’s a proven workhorse that keeps plants thriving without guesswork.

Unlike outdated HPS setups or low-end LEDs, the SolarXtreme 640 gives you precision control with dimming and an optional touchscreen controller to automate sunrise and sunset. It’s plug-and-play, ships fully assembled, and fits seamlessly in soil, hydroponic, or coco systems. If you’re tired of wasting energy on inefficient fixtures, this light provides the intensity and efficiency that translates directly into healthier plants and bigger yields.

Is the SolarXtreme 640 energy-efficient?

Yes. The SolarXtreme 640 operates at 2.8 μmol/J. Compare this to older HPS at ~1.3 μmol/J, standard double-ended HPS at ~1.7 μmol/J, and even premium HPS maxing at ~2.1 μmol/J. Modern LEDs like this one sit in the 2.5–3.5+ range, proving that you get more usable light per watt, translating to higher yields with less wasted electricity.

PPFD Map

California Lightworks SolarXtreme 640 PAR map detail showing PPFD distribution across a 4x4 grow area at 12 inch hanging height in micromoles per square meter per second.

Features

  • Ships Fully Assembled
  • Sleek newly-designed look
  • PPF: 1792 μmol/s
  • PPE: 2.8 μmol/J
  • Coverage Area: Up to 4’ x 4’ 
  • Premium Quality with LUMILEDS Diodes

What's Included?

  • California Lightworks SolarXtreme 640 LED Grow Light

California Lightworks SolarXtreme Video

Specifications

SKU: SX640 

Wattage: 640W

Input: 120–277V AC

Dimensions: 43.8" x 44.8" x 1.89"

Weight: 14 lbs

PPF: 1792 µmol/s

PPE: 2.8 µmol/J

Coverage Area: Up to 4' x 4'

Grow Light Central expert advice for indoor growing equipment

Who should use this full spectrum LED grow light?

  • Serious growers who need consistent results and top efficiency
  • Medium grow rooms and tents looking for reliable 4x4 coverage
  • Growers upgrading from HPS to LED for lower heat and higher PPE
  • Hands-on cultivators who want dimmable and automated control

Best applications

  • Veg and flower cycles with balanced full spectrum output
  • Hydroponics and soil setups needing uniform canopy penetration
  • Controlled environments using sunrise and sunset dimming
  • Home pros and small facilities focused on maximizing yield per watt

Why Shop with Grow Light Central?

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

“There’s a crapload of equipment providers out there. What makes Grow Light Central so special?”

Grow Light Central is a grow equipment solution provider connecting you to 100+ brands and 60+ suppliers trusted and used in the best grow facilities across the country.

Anthony, the owner and operator, personally ensures every order is handled right. No passing you off, no runaround, just the expert service and advice you deserve.

FAQs

How many watts do I need for my grow space?

The wattage depends on the size of your grow tent or room. A general guideline is 30-50 watts per square foot for high-light plants like cannabis. For example, a 2x2 ft area may need 100-200W, while a 4x4 ft area may require 400-600W for optimal coverage.

What is the difference between full-spectrum and red/blue LED grow lights?

Full-spectrum LED lights mimic natural sunlight, providing a balanced mix of blue (for vegetative growth) and red (for flowering and fruiting) light. Red/blue LED lights focus on specific wavelengths but may not support plants as effectively as full-spectrum lights.

Does California LightWorks offer energy rebates for LED grow lights?

Yes! California LightWorks facilitates a rebate program that helps growers switch from outdated HPS or HID lights to energy-efficient LED grow lights at little to no cost. Approved applicants can receive 100% free LED lighting through the program.

How does switching to California LightWorks LED grow lights help save electricity costs?

California LightWorks LED grow lights are designed to consume significantly less power than traditional HPS or HID lights. By switching to high-efficiency LEDs, growers can cut energy use by up to 50%, leading to lower electricity bills while maintaining or even improving plant growth.

What makes California LightWorks' LED grow lights different from other brands?

California LightWorks has been developing next-generation LED grow lights since 2008, using the latest advancements in high-efficiency solid-state lighting and automation technology. Unlike many competitors, we design, manufacture, and assemble our products in-house in Canoga Park, California, ensuring top-tier quality, performance, and durability.