Sol 4 175W-350W LED Grow Light (G4)

Sol 4 175W-350W LED Grow Light (G4)

Model number: SOL4
(based on 4 reviews)
Features and highlights: 45W, or 85W integrated G4 LED, fusion reflector, custom thin-finned heatsinks, low heat signature, future-proof modular build, upgradeable design, easy warranty replacements

In Stock Free ground shipping to the continental USA

Price: $649.00
Power Selection:  
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Terms and Conditions


 2 Years Warranty            90 Day Return Policy


Want a Great Deal? Contact us for discounted pricing on used/refurbished models of this light!

Product Description

The Sol 4 LED Grow Light is an engineering marvel, utilizing the latest Integrated LEDs to deliver a concentrated beam of light so bright we named it after the sun.  Sol 4 is designed for use in a 3' x 3' area, with tested PAR output matching that of a 350W-600W HPS!  Our refined and Patent-Pending 4th Generation spectrum features quantum balancing to ensure lightning fast growth rates, record breaking yields, tight internode spacing, super-dense flowers, and fruits so monstrous you'll bring all your outdoor plants indoors!

Spectrum is only half the equation to enormous yields however, because light must be delivered efficiently through plant tissues at high intensities to ensure optimal penetration/absorption. Our Patent Pending Fusion Reflector was developed specifically for this purpose, blending and focusing 100% of the output from our LEDs into a concentrated beam of light.  Unlike other LED Grow Lights, Sol uses no glass or acrylic lenses, which can block up to 10% light transmission with each layer.

Sol™ LED Grow Lights are an entirely new breed, with the same Hydro Grow performance, quality, and reliability, that has been proven time and again by third-party testing and real-time output data. Thanks to our ever-growing engineering and development team who work continuously throughout the year, we are proud offer the next generation of LED Grow Lights to the masses.  Purchase a Sol 4 today and experience the amazing power of the sun in your indoor garden! 





  • Modular Internal Build: Fully upgradable, easy warranties
  • Thermal Management: Custom ultra- thin finned heatsinks quickly dissipate heat for cool operating temperatures
  • Streamlined and Neat: Multiple units can be Power-Linked™ up to 1200W
  • Powerful: 45W-85W Integrated LEDs deliver blinding intensity
  • Versatile: Power cord available in 110v, 220v and international plugs

>>more about Hydro Grow Design

SOL Product Line
4 LED Grow Light Technical Specifications
LED Type: 4 x 45W 4 x 85W
Power Consumption: 175W 300W
HID Equivalent: 350W HPS 600W HPS
Working Voltage: 85V - 277V 85V - 277V
Input Current: 1.6A @ 110V (0.8A @ 220V) 3.2A @ 110V (1.6A @ 220V)
Operating Temperature: 115° - 125° F 140° - 155° F
Thermal Management: 4 x 80mm Dual Bearing Fans 4 x 80mm Dual Bearing Fans
Spectrum (nm): 440, 470, 525, 640, 660, 740 440, 470, 525, 640, 660, 740
Case Dimensions: 12.5" x 12.5" (32cm x 32cm) 15" x 15" (38cm x 38cm)
Hanging Weight: 10lbs (4.5kg) 14lbs (6.4kg)
120° Primary Coverage: 3' x 3' (92cm x 92cm) 4' x 4' (122cm x 122cm)
120° Supplemental Coverage: 12' x 12' (3.7m x 3.7m) 15' x 15' (4.6m x 4.6m)

*primary coverage based on 12-18" hanging height above canopy, supplemental coverage based on 6-10' above canopy.

Sol™ LED Advantages

  • Environmentally friendly - No Mercury, 100% recyclable
  • Easy Maintenance: no bulb replacements
  • Up to 55% energy savings compared to HID
  • Robust growth: at least 2x the yield watt for watt over HID
  • Long LED Lifespan: 50,000+ hrs
  • No accessories necessary: no cooling equipment, ballast or reflectors needed
  • Can be used with any growing method - hydroponic, aeroponics, soil
  • Integrated heavy duty ratcheting hanging system
Grow Light

175W, 350W
4 x 45W, 85W Integrated LEDs
85v - 277v
1.6A @ 110V (0.8A @ 220V)
115°F -155°F (32.2°C - 43.3°C)
440nm, 470nm, 525nm, 640nm, 660nm, 740nm
4 x 80mm dual bearing cooling fans
12.5" x 8.5" (32cm x 22cm)
10lbs (4.5kg)
3' x 3' (92cm x 92cm)
Write a review
(based on 4 reviews)

Reviewed on 5/10/2015

Plant grow almost to fast from seed. you can flower (12/12) alot sooner than i was used to from the X2 lights. altho the X2 lighst seems to develop the flowers faster that this light, this light gives a lot bigger flowers/fruit with a week or so more of 12/12.

Reviewed on 12/21/2013

I had a warranty issue with one of the SOL4 units (LED chip went out). I was sent a copy of the repair sheet and sure enough, as the web site says, it was a breeze to work on. Anyone with even a slight amount of common sense can service the SOL units (and hopefully you will never have to). Fill out the on line warranty claim & a call to the office and the replacement chip was sent out before I even sent back the faulty one. It arrived by USPS 2 day service and within ten minutes it was up and running again at full power. Kudos to Donnie and staff for prompt, efficient and friendly service!

Reviewed on 12/8/2013

The light works great. Have the 400 watt version. The footprint of the light output is amazing, covering a 4' x 4' area at only 12" above canopy. Growth rate is phenomenal. Only complaints are that the fans are louder than they need to be; for the price, I think that HydroGrow could use silent cooling fans (they are the same fans used in computers, quality computers use quiet fans and so should these lights). Also, the hanging hardware is misfit; comes with rigging to hang the light from one drop cord, so the light spins...although it does come with two drop cords, you have to rig something yourself to mount them and stabilize the light. The light itself is wonderful, I still love the light, just wish that those two minor flaws would be fixed. Right now, plants are two weeks into flower and look every bit as good as HID grown plants (if not better). Lower electric bill and heat issues gone forever!

Reviewed on 6/30/2013

Very happy with product contact could have been more prompt but happy good product

Remember, you can never get back the time or the harvest you lost
to your HIDs
but you can always get your money back with Hydro Grow.

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