Visit Us at Light24
20 & 21 NOVEMBER 2024 • ISLINGTON • LONDON
Pro-Lite provides a complete solution in the field of photometry and the measurement of light, lighting products and the optical properties of materials. Our range of equipment takes in the full “tool kit” that those working with lighting products might need, including handheld illuminance meters, colorimeters, spot luminance meters, integrating spheres in sizes from 25cm to 3m diameter, 2D imaging photometers for lit area luminance uniformity measurements and a range of advanced goniophotometres.
Goniophotometer Systems for Testing Architectural Lighting Products
SSL type C goniophotometers are suitable for testing the angular luminous intensity distribution of lamps, luminaires and architectural lighting products. Type C motion goniophotometers avoid tilting the sample with respect to gravity during a scan. This ensures that the lamp maintains a fixed burning direction, which is important for many types of architectural lighting (in particular, HID based luminaires). The SSL Resource range of IES type C motion goniophotometers includes the entry-level C-1 family, the more advanced LUMI series and the DECO 27 which meets the requirements of CIE S025 and IES LM-79-19 for a fixed (vertical) burning position during a gonio scan.
Holographic Diffusers Shape and Send the Light Where you Want it To Go
Compared with traditional transmission diffuser material, a holographic diffuser provides for precise control of the shape of the transmitted beam, in addition to homogenising the light and providing for excellent hiding of the light source and reduction of undesirable hot-spots.
Holographic diffusers are an enabling technology in many lighting, automotive and display applications.
Illuminance Meters
An illuminance photometer measures the luminous flux received at a surface per unit area. The measurement unit is the lumen per square meter, but this is simplified to the lux. Hence, illuminance meters are commonly referred to as “lux meters”. Tristimulus versions of our photometers tell you the colour (CIE chromaticity and correlated colour temperature, CCT in Kelvin) of the light source. Pro-Lite supplies illuminance photometers and colorimeters from Konica Minolta, including a number of models available for short-term hire. Illuminance measurements can also be performed using a spectroradiometer.
Portable Spot Photometer for Measuring Luminance
The Konica Minolta LS-150 is a portable photometer that measures “spot” luminance of displays in the units of candelas per square meter (cd/m2). The single lens reflex (SLR) viewing optics allows the operator to conveniently view an object through the eyepiece and then focus and align a central black measurement spot within the target. The LS-150 features a fixed 1° measurement field-of-view that corresponds to a minimum measurement spot size of 14.4mm. A series of accessory close-up lenses are available for the LS-150 which reduce the minimum measurement spot size down to 1.3mm.
The related LS-160 photometer has a reduced, 1/3° measurement field-of-view for applications requiring the measurement of very small objects, for example with back illuminated switches and controls. Please note that Pro-Lite maintains an LS-100 (predecessor to the LS-150) that is available for short term rental.
Labsphere Integrating Sphere Spectroradiometers
The Labsphere Illumia Plus 2 family of integrating sphere spectroradiometers measure the spectral radiant flux, luminous flux, colour and colour rendering of lamps, LEDs and luminaires. With sphere sizes ranging from 0.25 to 3.0m, any size or power of light source can be accommodated. The Illumia Plus 2 LM-82 system is configured for testing the performance of lamps and luminaires at elevated temperatures in accordance with IES LM-82, while the Illumia Pro 3 LM-85 system is configured for testing the performance of LED modules in accordance with IES LM-85. The Illumia Pro 2 UV integrating sphere spectroradiometer system is configured for testing the performance of UV LEDs in the range 200-400nm.
Jeti Specbos 2501-1 Spectroradiometer
The latest iteration of Jeti’s Specbos range of spectroradiometers, the Specbos 2501 builds on and improves the highly successful Specbos 1201 and 1211. Offering the same versatility, the Specbos 2501 can be configured for measuring a spot spectral radiance (luminance) and by attaching optional cosine diffuser, the Specbos 2501 can also be used to measure spectral irradiance (illuminance).
Being a spectroradiometer, the Specbos 2501 measures the spectral radiance or irradiance of the light source or display between 380 and 780nm (380-1000nm for the NIR model, 200nm-1000nm for the UV model) and accurately computes all of the derived photometric and colorimetric parameters, including luminance, illuminance, CIE chromaticity, correlated colour temperature (CCT) and colour rendering index (CRI), as well as circadian and other radiometric parameters. Accessory focussing optics are available to reduce the measurement area down to as small as 0.5mm diameter.
Portable Spectroradiometer for Illuminance & Colour Measurements
The ILT 350 is a portable, handheld spectroradiometer that is configured for measuring the illuminance in lux and colour properties (CIE chromaticity, CCT and colour rendering) of lamps, LEDs and other light sources. Whilst technically a spectroradiometer, we categorise the ILT 350 as a “photometer” as it provides spectroradiometric accuracy and capabilities for less than the cost of a traditional tristimulus colorimeter.
Radiometers
Pro-Lite supplies the International Light (ILT) range of light meters. A wide range of meters is offered, from pre-configured radiometers for measurements in the UV and blue part of the spectrum, to research-grade light meters that are user-configurable for use as both radiometers and photometers. For the latter, a vast array of interchangeable radiometric and photometric sensors, input optics and accessories are offered that allows for measurements of irradiance (W/m2), illuminance (lux), luminous or radiant intensity (candela or W/sr) as well as the total integrated dose/exposure in joules, J/cm2, lux*seconds and more.
Turn-Key System for Quality Control of Lighting Fixtures
The LightTester 100/160 family from SSL Resource is a range of versatile, semi-automated test stations for quality control testing of luminaires during production, reporting on key photometric, colorimetric and electrical safety parameters.
With a sequence time of under 10 seconds, a LightTester QC test station is suitable for a 100% testing regime. The LightTester system is supplied as a complete, “out-of-the-box” solution, including a test station table, test computer with software and all photometric and electric test equipment. The LightTester can be supplied either as a standalone unit (ST models) or integrated into a production assembly line (PL models).
Training Workshop: Radiometry, Photometry & Colorimetry
There are those who say that the science of measuring light is something of a dark art. We would respectfully disagree! From knowing your nits from your lumens, Pro-Lite’s Light Measurement & Photometry Training Workshop equips you with the knowledge to understand and express the performance of your products, and share specifications clearly and concisely throughout your supply chain.
Equipment Hire
For short-term requirements, Pro-Lite stocks a range of professional-grade, calibrated light metrology products that are available for hire, including lux meters, colorimeters, spot luminance meters and spot spectroradiometers. We also rent reflectance measurement instruments. Rental of our light measurement equipment can be a cost-effective solution for short term projects, or if you need to temporarily expand your in-house capabilities. Our light meters can be used to measure the “brightness” and colour of displays and all manner of light sources (lamps, luminaires, LEDs etc). All equipment is supplied with an up-to-date calibration that is certified as traceable to national or international standards. Even better, full technical and applications support is only a phone call away – with Pro-Lite you are dealing with light measurement experts.
