Plasma Grow-Lights

The UV420, a new UV grow-light, delivers vital UV-B (280-315nm), UV-A (315-400nm) and blue light (400-495nm). It is designed to complement PAR grow-lights, eg HPS and LED:

  • Adds the 280 - 495 nm missing from PAR lights
    Ceravision's UV420 output UVA and UVB to boost CBD Industrial Hemp Crop
    Industrial Hemp Boosted by UV from UV420 Grow-Light
  • Economically tailored to suit crops and growth cycles
  • Excellent illuminance to penetrate plant canopies
  • High lumen maintenance prolongs output
  • Small light source minimises luminaire shadowing
  • Unique spectral output influences plant physiology to boost nutritional and medical values
  • UV reduces incidences of diseases and pests
  • Post-harvest to boost to secondary metabolites, maintain freshness and extend shelf-life
  • Helps sterilise facilities between crops to reduce mould and bacteria.  

UV-B, UV-A and Blue Light Boost Crop Quality & Value

Plants have evolved over millions of years to exploit sunlight’s spectrum to power photosynthesis for growth and to regulate developmental processes. Research now shows that the UV radiation in sunlight has several beneficial effects on the development and nutritional quality of many herbs, fruits, vegetables and ornamental crops.  UV-B and UV-A effect growth, photosynthesis, secondary plant metabolites, and the plant-insect interaction in high-value crops.

UV-A and UV-B in sunlight activate a plant’s natural defence mechanisms, producing proteins that act as a “sunscreen” to protect the plant.  These influence photomorphogenic responses - gene regulation, flavonoid biosynthesis, leaf and epidermal cell expansion, stomatal density, stress and increased photosynthetic efficiency.  This synthesis of proteins in crops improves disease resistance, colour, fragrance, taste and potency.  The more UV exposure, the more such proteins are produced. 


When a plant detects UV-B at 288 nm, it produces the UVR8 protein.  This protein acts as a chemical ‘messenger’,

Salad Crops Improved by UV from UV420 Grow-light

which signals to the plant to secrete more oils and resins to help protect the plant and its seeds from potentially harmful UV-B.  The net result is that the UV-B boosts the production of flavonoids and terpenes - powerful compounds that dictate the flavour, aroma and colour.  

Plants grown outdoors are subject to varying amounts of UV wavelengths depending on their geographic location.  Plants grown under artificial lighting have not been exposed to UV - the UV-A and UV-B do not pass through greenhouse glass.  Traditional grow-lights provide lots of photons at the ‘red-end’ of the Photosynthetically Active Radiation (PAR) region 400 to 700 nm.  However, they lacked the high energy wavelengths from the blue-end and beyond that are essential to maximise a crop's development and yield. 

This is where the UV420 plasma grow-light shines.

Further Information

Future Applications

Delivering flexible spectral outputs, Ceravision's HEP plasma lighting offers added-value and economic solutions in horticulture grow-lighting and other commercial applications.

HEP Plasma Lighting Technology

Ceravision’s HEP plasma grow-lights, with a UV spectrum providing UV-B, UV-A and blue herald a new scientific direction for horticulture lighting.

Intellectual Property

Ceravision maintains an extensive Intellectual Property (“IP”) portfolio comprising Patents, Trade Marks and Design Rights.

Featured News

Dec 2019: Mr Andrew Fuller of Bridge Farm, explains how incorporating Ceravision's UV grow-light in its industrial hemp cultivation boosted cannabinoids by 40% (see video).


Oct 2019: Ceravision presents its new horticulture UV grow-light to demonstrate the reliability and flexibility of its patented plasma lighting at the NIAB Industry Workshop on Advances in Grow-Lighting...


Sept 2019: Independent lab tests on harvested industrial hemp crop at Bridge Farm Group confirm that incorporating Ceravision's complementary UV grow-light boosted cannabinoids by 40%.