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Helios Pro 4L | led grow lights


Helios Pro 4L : 4 cluster , 300W model

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   Introducing Helios series LED Grow lights

Full spectrum for all stages of growing. From seed to harvest.
this are ex demo or refurbish led.

Was £320 new

The name behind our latest generation of LED lighting derives from the Greek god of the sun and the sun itself. Helios. According to mythology, Helios was known for driving a chariot led by four fire-breathing horses across the sky each day.

Helios 4 LED Grow LightHELIOS Pro 4L : Helios Pro COB clusters, compact and powerful!

Dimensions :  60 cm Wide x 16.5 cm Deep x 7.5cm Deep

Weight : 5Kg

Area Covered:  2 Feet x 4 Feet (24 Inches) 3 x 5ft (36 Inches) 

Comparison:Tested PAR output & Penetration matches that of a 400W HPS 

General Description:This Light has 4 Modules with Mixed Array LED’s, each Array has 25 High Quality/Output 3W LED’s

  Max Power used 200 Watts (50W per Cluster Module*)

*The LEDs (3W rated) are driven at a power of 2 Watts each, this does not affect the Lumens these lights emit greatly, but prolong the efficiency & Lifespan of the LED itself.


  • Free UK Delivery 
  • Free Hanging Kit & Power Lead 
  • 2 Years Total Peace of mind Warranty
  • 2years Technical / after sales support
  • 90 days money back guarantee
  • From a UK based Company – no long waits for units/parts or repairs
  • Instant Communication at all times.

 Hi-Tech COB LED Clusters

Helios COB closeupAll models utilise an advanced 75W, Chip-On-Board [COB] technology, 6 spectrum cluster unit. This provides a huge power density and excellent spectrum blending across the grow area.  These High performance Integrated LED’s are the centrepiece of our latest high power LED Grow Light, a next generation set-up providing high power and efficiency whilst greatly improving reliability


Integrated LED’s

Integrated LED’s are functionally the same as their traditional counterparts, but rather than individually cased LED’s they are miniaturized and combined into single, multiple-spectrum arrays. This brings considerable advantages in thermal dissipation, creating a positive effect on lifetime; reliability and allowing us produce lamps that enter the next power-factor.


The High Powered 3 Watt LED’s are carefully selected from LED Manufacturers such as Bridgelux, Cree and Epistar and thoroughly quality checked before leaving the factory


The spectrums we use are 440nm, 460nm, 610nm, 630nm and 660nm & IR. Even though this spectrum is the currently the best we are always looking for new discoveries in fine tuning wavelengths and spectrums which could mean more newer spectrums may be available in the future. These units are fully upgradeable as well.


Heat Management

 Helios Pro Heatsink - image

Whilst being hugely more efficient than other methods of turning energy into light, 100% efficiency is impossible.  Therefore LED’s do generate some heat output and this needs to be adequately dispersed away from the LED chips themselves.  Note also that LED’s spectral output is affected by the chip running temperature.  The bottom line is : the better the heatsinking and thermal management, the better the long term stability and reliability of the LED grow light.    


Each Helios module has the mixed array LED hand soldered onto a metal core printed circuit board [PCB], These are the best component boards you can get for LED’s, specifically designed and produced by our own team of engineers.


Mounted On top of these are dual core, double plated heat sinks for superior cooling.


The efficient heat transfer paste is also carefully selected and tested thoroughly for its best heat dissipation from the LED diode to Heatsink


The whole internal components & Heat sinks are kept cool by high speed quiet ball bearing fans.


The only slightly warm air that comes from this unit is generated from exhaust from inside the unit from the heat sinks which are designed to transfer heat away from the rear of the LED diodes themselves.  The fronts of the lights are slightly warm to the touch. So heat generation is almost Zero. This also helps the

Residual Humidity inside the area.


From Germination to Flowering, this LED is very capable of creating BIG yields, Big dense flowers and fruit and has been proven over and over again.




By section 6 of the Misuse of Drugs Act 1971 it is an offence to cultivate any plant of the genus Cannabis in the United Kingdom without a license from the Secretary of State. Anyone committing an offence contrary to this section may be imprisoned or fined, or both. Visitors to this website are advised against breaking the law. 

LEDHydroponics.co.uk guarantees that ALL information collected here will not be released to any third party and your confidentiality and anonymity is safe guarded at all time. We value your privacy and any data collected will be for our own use in recognising you as our customer only.

Weight 5 kg
Dimensions 60 x 16.5 x 7.5 cm


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