HEP Plasma Lighting Technology

The HEP plasma grow-light, recently launched by Ceravision, delivers a unique spectrum comprising blue-light with UV-A and UV-B (missing from most indoor grow-lights), and green light.  HEP plasma grow-lights, with the ability to tailor spectral output for particular plants and outcomes, herald a new approach for horticulture grow-lighting.

HEP technology is a unique genre of electrodeless, radio frequency (RF) driven lighting invented by Ceravision. HEP uses RF in the microwave range to create a high intensity plasma discharge.  The design of the proprietary plasma burner allows the efficient collection and distribution of the light produced.  It comprises four key elements:

  1. Quartz RF resonator/plasma burner (the ‘lamp’);
  2. Transition unit (couples the RF energy from the source into the resonator);
  3. RF microwave source; and
  4. AC/DC power supply. 

The resonator/burner contains an inert gas and metal halide salts. RF microwave energy resonating within the lamp ionizes the gas to form a plasma that combines and vaporises the metal halide salts, emitting an intense, bright light. The light is emitted from a very small source, which enables the light to be accurately focussed and distributed and provide greater optical performance.  This method of producing light uses less energy and delivers more light of a better quality.  

Ceravision demonstrate the UV-A, UV-B and blue light from its UV420 HEP plasma grow-light.
HEP Plasma Grow-Lights
Output UV-A, UV-B and Blue Light

The absence of electrodes, or filaments, enables the use of a range of chemicals; chemicals, which if used in electrode lamps, would react with electrodes.  By careful selection of chemical dose components, HEP can deliver intense radiation across the spectrum.  This radiation is a combination of atomic and molecular emissions. 

Importantly, HEP has the flexibility to tailor spectra.  This is particularly useful for horticulture applications where spectra can be developed for plasma grow-lights to suit specific plants or growing cycles. 

Ceravision has launched its UV420 plasma grow-light for horticulture and hydroponics markets.  The grow light delivers the blue-light with UV-A and UV-B that is missing from most grow-lights, and green light. 

HEP plasma lighting lends itself to a number of other high-output applications including lighting for: Reptile Houses; Artificial Coral Growth; Insect Breeding; TV Film and Studio Lighting; and UV-C for sterilisation. 

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.