Horticulture Grow Lighting

Ceravision is developing and launching a family of grow-lights.  Greenhouse tests are confirming performance and economic benefits over legacy grow-lighting technologies such as high intensity discharge (HID) and newer technologies such as linear fluorescent and LEDs.

The Ceravision UV420 High Energy Photon Grow Light, is now available.

Ceravision’s technology provides technical and commercial advantages over other grow-light technologies:

  • More complete light spectrum, including UV, which can be economically tailored to suit crops
  • More energy efficient than HID grow-lights
  • Excellent illuminance ensures light penetrates plant canopies more than fluorescent and LEDs
  • High lumen maintenance prolongs output compared to HID or HPS
  • HEP’s small light source minimises luminaire shadowing, unlike LED luminaires
  • UV420's spectral light output influences plant physiology.

The new ‘blue-light’ spectrum and luminaire are designed to complement the lighting traditionally used in horticulture and to reduce a project’s capital costs by c46% and operating costs by c5%.

Plants Need PAR, Blue Light, UV-A & UV-B

Plants have evolved over millions of years to exploit sunlight’s full spectrum. Light powers photosynthesis for plant growth and regulates various developmental processes. 

UV-A and UV-B light activate a plant’s natural defence mechanisms, producing proteins that act as a “sun screen” to protect itself from 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.  Using good grow-lights it should be possible to replicate the particular geographic conditions to enable plant growth to be replicated anywhere.

However, plants that are grown indoors under artificial lights have not in the past been exposed to natural UV.  Traditional grow-lights focused on providing energy purely in the Photosynthetically Active Radiation (PAR) 400 nm to 700 nm region and provided lots of photons at the ‘red-end’ of the spectrum: they lacked the spectral content essential for the development of important plant characteristics.

Ceravision’s UV420 Luminaire delivers UV-A (315 - 400 nm), UV-B (280  -315 nm) and visible blue light (400 - 800 nm).  It is designed to complement other grow light sources used for horticulture. 

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 Lighting Technology

Ceravision’s High Efficiency Plasma (HEP) lighting technology, with its spectral output and efficiency, offers solutions in a range of applications and is perfect for horticulture grow-lighting.

Intellectual Property

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

Featured News

Ceravision's new UV420 is shown at Autopot Summer Special 18th - 19th August 2018


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


The testing of Ceravision’s High Efficiency Plasma (HEP) lamps in Rothamsted has been underway now for four months. The testing compares Ceravision’s HEP lamps with legacy metal halide lamps and new LED systems and their impact upon the growth of wheat.