|For light souces, displays and signs, we measure the amount of light produced, its colour, its rendering quaility and its spatial or angular distribution. We also report the energy efficiency (LOR, luminous efficacy, energy efficiency index) and photobiological risk group. We compile photometric data in .ies and .ldt (EULUMDAT) standard formats as well as UGR glare rating tables. We also measure the optical properties of materials (reflectance, transmittance and scatter). » More
||► What is "flicker" and why is it a problem with SSL?
► How to measure the colour uniformity of arrays of LEDs
► Understand why phosphor white LED lighing can suffer from undesirable colour zoning
» More Talking Photometry articles
||Catch Dr Gareth John's "Photometry Focus" column in Lighting Magazine each month. Each article reports on the best of the previous month's fittings that have passed through the Photometric Testing laboratory.
Latest Photometry Focus Articles
November 2014: QE Global's LED streetlight
► October 2014: RCL's LED spotlight
► September 2014: Hardie Secure's LED streetlight
► July 2014: MHA's LightStar 600mm diffused LED ceiling fitting
► June 2014: Cambridge Light's LED high bay fitting
►May 2014: CML's LED aviation lamp
► April 2014: Lumenox's LFS12 LED floodlight
► March 2014: Photonstar LED's Nemesis colour tuneable downlight
► February 2014: Integral LED's Omni-LED GLS light bulb
► January 2014: LumaxLED's LED tube
» See all Photometry Focus articles
If you feel that your lighting product stands out from the crowd and would be a suitable candidate for testing for a future Photometry Focus review, contact us using our enquiry form.
||► Mar 2015: Size IS important and we've just invested in a 2m integrating sphere photometer for our Cheltenham laboratory
► Feb 2015: Announcing seminar on Lighting and Transportation - London, 30 April 2015. Seminar at the Department of Business, Innovation & Skills, held in association with the Institution of Lighting Professionals (ILP), Konica Minolta and Pro-Lite Technology
► Feb 2015: 2015 training course schedule - dates for photometry & light measurement, photobiological safety and laser safety training workshops have been announced