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Scientific survey: LEDON lamps are test winners
In the end the most important factor when buying lamps is the light itself and its quality. It should be natural and friendly, bright enough, and dimmable if possible. Outstanding lighting quality is one of the most important properties of LEDON LED lamps. This has been proven by a comparative study dedicated to lighting quality.
In two test situations, LEDON LED lamps achieved a ranking of first place. In terms of lighting quality they set themselves apart from both standard energy-saving lamps and a further LED light source, and also from conventional incandescent lamps, until now the most pleasant source of light. The comparative survey for colour perception of the various light sources was carried out by a company associated with the well-known optical institute of the University of Pannonia (Hungary) under the chair of Prof. Dr. Janos Schanda, and commissioned by LEDON Lighting Jennersdorf.
Precise test situation and detailed results
Colour perception of LED lamps
A comparative survey
The focus of the survey was to compare the lighting quality of traditional incandescent lamps (40 watt) with three modern light sources with corresponding brightness:
- 1 conventional energy-saving lamp
- 1 white LED lamp
- 1 new LEDON LED lamp
Light sources examined
| L-00: conventional 40 watt incandescent lamp |  |
| L-01: conventional 28 W halogen lamp * |  |
| L-02: conventional 7 W energy-saving lamp |  |
| L-03: LED lamp, dimmable, 7 W |  |
| L-04: LEDON dimmable LED lamp, 6 W |  |
* This lamp was eliminated from the survey as it did not achieve the required lux values.
Test criteria and test persons
Colour perception was determined according to three basic perception criteria:
- Naturalness: How natural is the light perceived to be?
- Vividness: How lively (saturated colours) is the light perceived to be?
- Preference: The light from which light source is most pleasing?
The study was conducted by 25 observers including 6 trained expert observers (“experts”) and 19 observers who had no lighting technology experience (“non experts”).
The results were assessed both separately (categories “experts” and “non experts”) and jointly (category “all”).
Survey design
Procedure:
The quality of colour rendering was determined via visual colour differentiation tests, standard images and real objects (fruit and vegetables).
Survey design in three parts:
- Absolute evaluation of the colours of real fruit and vegetables
- A comparison of pairs of four standard test images illuminated by the incandescent lamp, and each compared to the three modern light sources
- Colour quality tests for determination of the visual colour perception according to standard test objects
Overview of test results
| Incandesecent Lamp L-00 |
Energy Saving Lamp L-02 |
LED-Lamp L-03 |
LEDON LED-Lamp L-04 |
||
| Absolute Judgement | |||||
| Vividness | all | 2 | 1 | 3 | 4 |
| non experts | 4 | 1 | 2 | 3 | |
| experts | 1 | 2 | 4 | 3 | |
| Preference | all | 3 | 1 | 2 | 4 |
| non experts | 4 | 1 | 2 | 3 | |
| experts | 1 | 2 | 4 | 3 | |
| Naturallness | all | 3 | 1 | 2 | 4 |
| non experts | 4 | 1 | 2 | 3 | |
| experts | 1 | 2 | 3 | 4 | |
| Total (of all participants) | 8 | 3 | 7 | 12 | |
| Pairing Test | |||||
| Vividness | all | 1 | 3 | 4 | 2 |
| non experts | 2 | 4 | 3 | 1 | |
| experts | 1 | 3 | 4 | 2 | |
| Preference | all | 2 | 3 | 1 | 4 |
| non experts | 3 | 2 | 1 | 4 | |
| experts | 3 | 4 | 1 | 3 | |
| Naturalness | all | 3 | 2 | 1 | 4 |
| non experts | 3 | 2 | 1 | 4 | |
| experts | 2 | 4 | 1 | 3 | |
| Total (of all participants) | 6 | 8 | 6 | 10 | |
Ranking:
4 best ranking, 1 worst ranking
| Overall test winner |
| Test winner in 1 category |
Conclusion
On average, the latest technology, represented by LEDON LED, achieved best results in all experiments, whereby the advantage in terms of naturalness was greatest.
