Plasma Grow-Lights

Ceravision is developing HEP plasma grow-lights for horticulture and hydroponics markets.  Tests confirm performance and economic benefits over other grow-light technologies such as high intensity discharge (HID), linear fluorescents and LEDs.  Our unique UV420 Plasma Supplementary Grow-Light, is now available.Ceravision's UV420 grow-light with blue light, UVA light and UVB light on tomato crop.

The UV420 plasma supplementary grow-light delivers a UV-A (315 - 400 nm), UV-B (280  -315 nm) and visible blue light (400 - 800 nm).  This unique supplementary grow-light is designed to complement other grow-light, particularly HPS lights, used in horticulture. 

The UV420 plasma grow-light provides technical and commercial advantages over other supplementary grow-light technologies:

  • A unique light spectrum, including wavelengths of blue light, UV-A light and UV-B light
  • Economically tailored to suit particular crops and growing periods
  • 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 light output influences plant physiology.

The UV420 plasma grow-light is designed to fill the 'spectrum gap' and to complement the lighting traditionally used in horticulture, typically reducing a facilty's capital costs by c46% and its operating costs by c5%.

Plants Need PAR plus 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. 

The UV-A and UV-B wavelengths in the natural sunlight spectrum activate a plant’s natural defence mechanisms, producing proteins that act as 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. 

For example, 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. But, plants grown indoors under artificial lighting have not  been exposed to natural UV.  Traditional grow-lights focused on providing energy purely in the Photosynthetically Active Radiation (PAR) 400 to 700 nm region and provided lots of photons at the ‘red-end’ of the spectrum, but they lacked the spectral content essential for the development of important plant characteristics.  Incorporating the UV420 plasma grow-light as part of a traditional grow-lighting system, it is possible to create full-spectrum lighting and replicate the optimum geographic/climatic conditions to enable plant growth anywhere.

Further Information

Future Applications

Light is now a value added utility in many sectors. Offering a wide spectral range and energy efficiency, Ceravision's HEP lighting technology has the flexibility to offer economic solutions in high value global markets.

HEP Plasma Lighting Technology

HEP Plasma lighting is perfect for horticulture grow-lighting, where it delivers UV-A and UV-B light; and with its flexible spectral outputs and efficiency it offers solutions across a range of applications.

Intellectual Property

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

Featured News

Ceravision staff pictured delivering the first of its new UV420 Grow-lights to The Greenhouse Effect


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


Ceravision's unique UV420 Plasma Grow-light revealed at Greentech show in Amsterdam in June 12-14 2018.