LIGHT LAB
Photometric Measurements for Luminaires and Light Sources
We measure and test luminaires and light sources according to national and international standards. This results in reliable lighting data for product development, quality assurance, planning and certification.
Accredited Lighting Laboratory
Since 1998, we have been operating in accordance with DIN EN ISO/IEC 17025. This makes us the first accredited and manufacturer-independent lighting laboratory in Germany.
Accreditation Certificate →
List of Procedures →
Rückführbare Messungen
Unsere Fotometrie ist auf das internationale Lichtstärke-Normal der physikalisch-technischen Bundesanstalt (PTB) rückführbar.
SERVICES
Our Measurement Services
Luminous Flux of Lamps
We measure a wide range of light sources up to 1000W with maximum precision.
- We ensure operation with the appropriate control gear.
- We prepare the measurement using the correct burn-in cycle.
- We guarantee maximum precision. Depending on the light source, our measurement uncertainty (with k = 2) is max. ± 5.0%.
You receive:
- a detailed measurement report including the actual luminous flux (lm)
- information on the electrical operating characteristics
- optional energy efficiency classification according to EU Directive 98/11/EC, required for household lamps and displayed via an energy label
Luminous Intensity Distribution
We capture the light distribution characteristics of a wide range of luminaire types and create luminous intensity distribution curves (LIDC).
Possible luminaire types:
- Surface-mounted luminaires
- Recessed luminaires
- Pendant luminaires
- Wall luminaires
- Floor-standing luminaires
- Table luminaires
- In-ground luminaires
- Street luminaires
- Inset lights according to ICAO
- Traffic signal luminaires
- Portable luminaires
You receive:
- a measurement report including the luminous intensity distribution curve (LIDC). Depending on the lamp, the measurement uncertainty (with k = 2) is max. ± 8.0%
- the luminaire efficiency (for relative measurements only)
- the electrical operating characteristics: current, voltage and power
- the photometric data in digital format, usually as .LDT files and, on request, in other photometric formats such as .IES, .TM14 or .LTLI.
If you require measurements of the same luminaire with different optical elements, you benefit from our discounted follow-up measurement prices.
Reflexance and Transmittance
We determine the reflectance and transmittance of various materials in accordance with DIN 5036-3.
We use standard illuminant A (2850 K) or daylight D65 as the reference light source. You receive a detailed measurement report as the result.
Angle-Dependent Measurements
We measure angle-dependent reflectance or transmittance for eight angles per sample.
Good to know
We perform all measurements under standard conditions (according to EN 13032):
Ambient temperature 25°C ± 1°C | Mains voltage 230 V / 50 Hz | Air movement max. 0.1 m/s
We use precision measuring equipment for all photometric parameters: mirror goniophotometer with 2.40 m and 18.00 m measuring distance | integrating sphere with 3.00 m diameter | integrating sphere with 1.25 m diameter | optical bench with 6.00 m length | mobile precision measuring devices for illuminance and luminance | imaging luminance camera.
We also determine all colour-related data for any light source within the visible range (380 - 780 nm):
Spectral power distribution | General colour rendering index Ra (according to DIN 6169 and CIE 1996) | Special colour rendering indices | Chromaticity coordinates (x and y coordinates in the CIE colour space) | Correlated colour temperature in Kelvin [K] | Dominant wavelength and colour saturation
FEEDBACK
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