Plasma Grow-Lights

The UV420 UV grow-light, delivers UV-B (280-315 nm), UV-A (315-400 nm) and blue (400-495 nm) to complement normal PAR grow-lights:

  • Economically tailored to suit crops and growth cycles
    Ceravision's UV420 grow-light outputs UVB and UVA to boost CBD in medicinal cannabis crops.
    Industrial Hemp Boosted by UV from UV420 Grow-Light
  • Excellent illuminance to penetrate crop canopies
  • High lumen maintenance prolongs output
  • Small light source minimises luminaire shadowing
  • Influences plant physiology to boost nutritional and medicinal values
  • UV reduces incidences of diseases and pests
  • Post-harvest to prolong freshness and shelf-life
  • Helps sterilise facilities to reduce mould & bacteria.

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

Plants have evolved over millennia to exploit sunlight's spectrum to power photosynthesis for growth and to regulate developmental processes. Research now shows that solar UV-B is vital and such that crops grown outside have greater nutritional values than those grown inside.

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 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 that signals to the plant to secrete more oils and resins to help

UV-B grow-light boosts greenhouse crops adding nutritional, medicinal and commercial values.
Salad Crops Improved by UV-B from UV420

protect the plant and its seeds from potentially harmful UV-B. The 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 depending on their geographic location. Plants grown under artificial lighting have not been exposed to UV-B as UV-B rays 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 lack the high energy wavelengths from the blue-end and beyond and it these that maximise a crop's development and yield.

The benefits do not end after cultivation. Used post-harvest, UV-B continues to boost secondary metabolites to continue to protect and enhance the crop. In strawberries for example, UV-B deters the growth of mould and prolongs their freshness to allow longer shelf-life and wider distribution network. And the same UV-B grow-light post-cultivation can sterilise surface tops removing bugs and pathogens (eg mould and powdery mildew) to create a clean grow room.

The UV420 is a perfect complementary grow-light and provides real added-value.

Further Information

Future Applications

Delivering flexible spectral outputs, Ceravision's lighting offers practical economic solutions in horticulture and other applications including UV-B lights to help production of vitamin D in reptiles and humans, and UV sterilisation.

HEP Plasma Lighting Technology

Ceravision’s HEP plasma grow-lights, with a spectrum providing UV-B, UV-A and blue herald a new scientific future in horticulture lighting and UV-B is beneficial for humans producing the vitamin D essential for health.

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%.