Plasma Grow-Lights

Tests with Ceravision HEP plasma grow-lights confirm performance and economic benefits over other grow-light technologies such as high intensity discharge (HID), linear fluorescents and LEDs. 

Ceravision's UV420 grow-light with blue light, UVA light and UVB light on tomato crop.

Our UV420 Plasma Supplementary Grow-Light delivers UV-B (280-315 nm) and UV-A (315-400 nm) radiation, along with visible blue and green light (400-560 nm).  This unique supplementary grow-light is designed to complement other grow-lights, particularly HPS lights, used in horticulture. 

This plasma grow-light provides performance and commercial advantages over other grow-light technologies:

  • Spectrum from 280 - 550 nm, the essential blue light, UV-A and UV-B light, and green light
  • Economically tailored to suit crops and growth cycles
  • More energy efficient than HID grow-lights
  • Excellent illuminance to penetrate plant canopies
  • High lumen maintenance prolongs output
  • Small light source minimises luminaire shadowing
  • Unique spectral output influences plant physiology.  

Plants Need Blue Light, UV-A & UV-B

Plants have evolved over millions of years to exploit sunlight’s full spectrum to power photosynthesis for growth and to regulate various developmental processes. 

Research now shows that ultraviolet radiation in natural sunlight spectrum 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 horticultural and agricultural crops.

The UV-A and UV-B wavelengths in sunlight activate a plant’s natural defence mechanisms, producing proteins that act Cannabis Crop under Ceravision's UV420 Growlight supplementing an HPS lamp with blue light, UV-A and UV-B to maximise medicinal CBD a “sun screen” for protection against harmful light.  These influence photomorphogenic responses including 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’, which in turn, signals to the plant to secrete more oils and resins to help protect the plant, and just as importantly its seeds, from potentially harmful UV-B rays.  UV-B boosts the production of flavonoids and terpenes within the plant, these powerful compounds dictate the flavour, aroma and colour of plants flowers.  These qualities are essential in commercial crop production. 

Plants grown outdoors are subject to varying amounts of these wavelengths depending on their geographic location.  Plants grown indoors under artificial lighting have not been exposed to natural UV.  Traditional grow-lights focused on providing lots of photons at the ‘red-end’ of the Photosynthetically Active Radiation (PAR) region 400 to 700 nm.  However, they lacked the energy from the blue-end of PAR and beyond that are essential to maximise a plant's development and a crops yield. 

This is where the UV420 plasma grow-light shines! 

The UV420 plasma grow-light fills the 'spectrum gap', complementing traditional horticulture grow-lights to:

  1. Create a natural spectrum light to enable plants to be grown anywhere;
  2. Optimise a plant's nutritional and medicinal properties; 
  3. Reduce a facilty's capital costs by c46% and operating costs by over 5%; and
  4. Increase a crop's market value.

Further Information

Future Applications

Offering 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 unique spectrum providing essential blue, UV-A, UV-B and green light, herald a new future for horticulture lighting; and they can be tailored to suit different plants and outcomes.

Intellectual Property

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

Featured News

Ceravision is now a member of UV4Plants - the recently formed International Association for Plant UV Research


Ceravision delivering the first of its UV420 plasma UVA and UVB Grow-lights to The Greenhouse Effect


Ceravision's new UV420 plasma grow-light is shown at Autopot Summer Social 18th - 19th August 2018.