UV420 Grow Light

Ceravision’s team of scientists and technicians have used their combined commercial and scientific expertise to design, develop and produce the new UV420 High Energy Photon Grow-Light.  Testing for compliance to all the relevant international standards for the UV420 has been completed by independent laboratories and the the UV420 is CE marked.

This unique grow light delivers UV-A, UV-B and blue light to provide stronger, faster vegetative growth and more resinous, higher yielding crops.

Ceravision's lamps and spectra provide proper UV-A, UV-B and blue light that can be adjusted through power, reflectance and glass filters to deliver the optimum amount of complementary light, tailored to be crop specific.  Crops grown under our lights will produce higher levels of terpenes, essential oils and flavonoids. 

UV420 Delivers Enhanced Performance

Total Light Delivered Over 2.0m2
Other Plasma - 56 Watts CMH - 77 Watts UV420 - 115 Watts
  Distribution   Distribution   Distribution
  Blue 50.7 90%   Blue 72.6 94%   Blue 87.4 76%
  UV-A 5.5 10%   UV-A 4.54 6%   UV-A 22.5 20%
  UV-B .05 0%   UV-B 0.0005 0%   UV-B 4.8 4%


The UV420 dose consists of metal halides that are completely evaporated.  This removes any potential for degradation on the inner surfaces of the capsule during operation and allows for lamp life of up to 50,000 hours. Other Plasma technologies and metal halide lamps suffer from material stress of the capsule caused through chemical reactivity of the metal halide liquid pool which is a precursor to failure and reduced life.

UV420's Patented Dose Provides Extended Life and a 2-year (12,000 hrs) Warranty

   Metal Halide      Other Plasma    


  Electrodes Yes No No
  Metal halide Yes Yes No
  Chemical reactivity High High Low
  Material Stress Medium High Low
- UV-A - Low High
- UV-B - Low High
- Blue High Medium High
  Maintenance High High High
  Dimmable No No Yes


UV420W's Unique Features

The quantity and wavelength of light reaching the crop can be modified according to the reflector glass used:

  1. Standard Glass: (WHITE surround) has a lot of blue light and minimum UV-A and UV-B (see black line in charts below).
  2. Enhanced UV: (RED surround) has increased UV-A and UV-B (see red line in charts below).
  3. Enhanced UV+: (BLUE surround) has maximum UV-A and UV-B (see blue line in charts below).

 Relative Light Qantity from 200 nm to 800nm​


 Relative Light Qantity from 260 nm to 400nm​


Photosynthetic Pigments and the UV420 Spectrum


HPS, LEDs & Ceravision's UV420 High Energy Lamp

Studies have shown that full continuous spectrum with sunlight qualities is the best spectrum for healthy plant development.  Plants grown outdoors are subjected to varying amounts of both UV-A (315 - 400 nm) and UV-B (280 - 315 nm) depending on geographical location and time of year.  There is increasing evidence indicating that UV-A and UV-B radiation influences photomorphogenic plant responses including gene regulation, flavonoid biosynthesis, leaf and epidermal cell expansion, stomatal density, and increased photosynthetic efficiency.  Exposure to UV radiation may also induce the synthesis of specific proteins involved in resistance to microbial attack. Plants absorb light best at specific peaks in the blue and red spectrum (465nm and 665nm).  

High pressure sodium lighting (HPS) provides an efficient source of PAR, producing intense light for indoor plant growth; but HPS doesn’t produce usable UV and lacks the necessary power at the lower end of the spectrum (the high energy blue range below 560 nm).  LEDs are mono-chromatic and do not have a full spectrum similar to the sun, which can lead to inhibited plant growth and are also lacking in UV, essential for optimal plant growth and development.  Metal halide (MH), Ceramic metal halide (CMH) or Fluorescent lighting can help to increase the blue spectrum, however they offer very little UV light.

Good Reasons to Choose the UV420

With a spectrum of 280 - 550 nm, the UV420 produces intense visible blue light, UV-A and UV-B and filters out harmful UV-C, the UV420 may be the most efficient complementary grow-light around:

  1. Faster rooting of plants followed by stronger, faster vegetative growth and more resinous, higher yielding crops.
  2. Protection from moulds and mildew and near elimination of pests.
  3. Easily changed reflector glasses offer blue-light and UV options to suit growth stage.
  4. Low maintenance with low running costs and fully compatible with existing contactors and timers.
  5. Complementary light used in conjunction with HPS and LED will deliver optimal plant development.
  6. Increased terpenes, essential oils and flavonoids plus abundant trichome production.
  7. Protection from moulds and mildew and near elimination of pests.
  8. Small light source size ensures compact luminaires and minimal shadowing.
  9. Uniform distribution of 2.0m2 at a hanging height of 2.0m and good penetration in hi-wire crops.
  10. Reflector glass can be easily changed to suit your requirements.
  11. Extremely low lamp degradation, 50000hr+ magnetron life and a tough, durable casing.

 ....................and it comes with Ceravision's 2-year or 12,000 hours warranty.

Light Distribution

Technical Data

 Product Name    Ceravision UV420W
 Manufacturer    Ceravision Lighting Limited
 Power Consumption    430 Watts
 Mains Supply Voltage    110-240 Volts at A/C 50-60 HZ
 Weight    10 kg
 Dimensions    439 x 336 x 449mm
 Ambient Operating Temperature    0ºC  to 40ºC


Sales Contacts

Commercial enquiries: please contact Stuart Stoddart, Commercial Development & Global Sales, at Ceravision, email: stuart.stoddart@ceravision.com

UK Retail Sales: please contact The Greenhouse Effects on 01908 585283, email: info@ghedirect.co.uk (www.ghedirect.co.uk/)

Europe and Rest of World: please contact Sales at Ceravision, email: sales@ceravision.com

Interested in becoming a distributor of Ceravision’s grow-lights, please contact, email: info@ceravision.com

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.