National Physical Laboratory

Hyperion Lighting

NPL provided Hyperion Lighting with confirmation that their new energy-efficient fluorescent lamps meet the high energy-saving and light quality targets set for them.

About the customer

Hyperion Lighting HT8 fluorescent lamp
The Hyperion Lighting HT8 fluorescent lamp
provides the same light quality as a conventional
T8 lamp, while using half the energy
Hyperion Lighting logo

Lighting accounts for one sixth of UK electricity usage (source: Carbon Trust) and is seen as an area where energy reduction can be achieved relatively easily and cheaply.

The uptake of energy-efficient lighting can have a large impact on the UK's overall energy usage and associated carbon footprint, and this, coupled with increases in energy prices, is forcing businesses to look for ways to reduce energy use, or else pass increased costs on to their customers.

Hyperion Lighting manufactures energy-efficient fluorescent lighting solutions, filling the gap between current lighting products and future LED technologies that still have technical hurdles to overcome. Their products are designed to be a cost-effective solution for reducing electricity consumption.

The Challenge

In order for new lighting products and technologies to be taken up by users, there need to be reliable measurement methods in place to characterise their performance.

Hyperion Lighting had been working on a new design for an energy saving linear fluorescent lamp called the HT8. Their aim was to provide the same amount of lux (light intensity) as a standard commercial T8 lamp but with around half the energy consumption. The HT8 is designed to replace the traditional T8 lamp without any expensive modifications to existing fittings or wiring.

Hyperion Lighting approached NPL to provide the performance data required to validate their product claims, as NPL has the expertise and equipment required to provide absolute and traceable measurement of light.

The Solution

NPL was able to test several versions of the HT8 lamps in controlled conditions and provide all the key photometric and electrical performance data to assess lamp performance using unique facilities, such as the NPL Goniospectroradiometer.

The measurements carried out by NPL included: total luminous flux (how much light), luminous intensity distribution (where the light goes) and spectral distribution of the light source (colour properties of the light). Differences in the spectral output of light sources are important as they affect human perception and therefore the preference of one lamp over another. Traceable measurements were also made of the input electrical power in order to calculate the lamp's energy efficiency.

Absolute photometric data displayed as a polar plot of luminous intensity distribution
Absolute photometric data displayed as a polar plot of luminous intensity distribution

NPL scientists gave expert guidance to Hyperion Lighting in assessing and interpreting the test data, presented in industry-standard photometric data format, so that it can be used in lighting design software packages for product development.

The Impact

Dickson Cheung, Managing Director of Hyperion Lighting, said: "The NPL consultant was able to provide expert guidance in assessing and interpreting the test data and we are now confident that the new design has met the desired performance without compromising on light delivery or quality."

Hyperion Lighting can now market the HT8 lamp using the performance data supplied by NPL, and end-users can benefit from the energy savings brought about by the product, safe in the knowledge that they are not compromising on lighting performance.

The cost of replacing fluorescent lamps can be financed through a Carbon Trust loan

More on NPL's work for the lighting industry

For more information, please contact Paul Miller

Last Updated: 2 May 2012
Created: 12 Sep 2011

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