Solar Light is a global leader in light testing services offering accelerated UV testing, spectral transmission analysis, and spectral scanning of light sources for over 40 years. Our NIST Traceable testing laboratory provides testing services meeting ASTM & ISO standards.

Testing Services

UPF Evaluation of Fabrics and Materials

Accelerated UV Testing of Materials for Indoor & Outdoor Exposure,

UV Transmission of Materials affected by Accelerated UV Exposure

Spectral irradiance of Light Sources

List of Testing Applications


UV Testing Laboratory

Solar Light Company, Inc. provides Accelerated UV Testing of Material services, for both indoor & outdoor exposure, using either xenon arc sources or fluorescent sources of several types.  Our lab can expose your samples to UV, simulating a year’s worth of sunlight in just a few days. We can expose plastics, paints, coatings, textiles, papers, and other materials to UV light to test how they will stand up to years of abuse. Using only state of the art Solar Light Solar Simulators,  we customize a testing regimen specifically for each’s customer’s unique requirements, and the accelerated life testing will objectively show how a material reacts to long term sunlight exposure. We have decades of experience in such testing, and are the first choice for the most demanding clients in Aerospace, Automotive, Medical, Fashion, Furniture, and dozens of other industries worldwide.

Paints & Coatings:

We can expose your paints and coatings for color fastness testing and accelerated life testing to long term UV exposure. Find out if the paint you are using or manufacturing will withstand years worth of UV weathering. Testing of paints and coatings follows ASTM standard G155 or other standards.


Test your textiles for color fastness and degradation to long term UV exposure. Many textiles will fade rapidly under sunlight. An accelerated test will show how much your textiles are fading or degrading and allow you to determine if you need to use another textile or add more UV inhibitor.


We can test your plastics, vinyl, PE, ABS, acrylics, Polycarbonate, PET, HIPS, and other synthetic materials for degradation and color fastness. Our test strategies follow ASTM standards G155, D2565, D4459 and more. Have your plastics put through an environmental weathering test and view the level of degradation. Test results can be seen in a matter of days. Refer to test chart for acceleration rates.

Paper products:

Many packages and labels fade after a short period of being exposed to light, which may be due to a lack of UV inhibitor used in the ink. We can perform fade resistance tests that will show whether or not your material will fade and how long it will take. Accelerated color fastness testing can be performed on any wood pulp product like paper labels, card board packaging, wall paper, and other items.

Accelerated Indoor Fluorescent UV testing:

Test the effects of fluorescent light sources on paints, wall coverings, coatings, fabrics such as carpets, curtains, furniture and so many more substances in our laboratory.

Indoor UV Exposure Testing:

Test the effects of indoor UV exposure on items such as medical packaging and disposables using our state of the art laboratory equipment, which is capable of meeting all typical exposure needs.

Accelerated Weathering (Performed Indoors):

Test the effects of outdoor temperature, humidity, moisture, and range of UV and light exposure on items such as medical packaging and disposables using our state of the art laboratory equipment, which is capable of meeting all typical weathering needs.


Accelerated UV Testing Chart: Temperate Zone (Mid latitude)

> Spot size vs. Time to test

1 year
3 years
5 years
7 years
10 years
15 years
2 cm
4.8 days
14.3 days
23.8 days
33.3 days
47.6 days
71.3 days
3 cm
11 days
32 days
54 days
75 days
107 days
161 days

Accelerated UV Testing Chart: Sub-Tropical Zone

> Spot size vs. Time to test

1 year
3 years
5 years
7 years
10 years
15 years
2 cm
5.4 days
16 days
27 days
38 days
54 days
81.6 days
3 cm
12 days
37 days
61 days
86 days
122 days
184 days

Accelerated UV Testing Chart: Tropical Zone

> Spot size vs. Time to test

1 year
3 years
5 years
7 years
10 years
15 years
2 cm
7.2 days
22 days
36 days
50 days
72 days
108 days
3 cm
16 days
49 days
81 days
113 days
162 days
243 days

Accelerated UV Testing Chart: Desert Zone

> Spot size vs. Time to test

1 year
3 years
5 years
7 years
10 years
15 years
2 cm
8.9 days
27 days
45 days
63 days
89 days
134 days
3 cm
20 days
60 days
101 days
141 days
201 days
302 days

Spectral Measurement Services

Solar Light can provide spectral analysis of detectors, light sources, and the transmissivity and reflectivity of materials. Using advanced spectroradiometers, monochromators, NIST traceable standard lamps, and NIST Traceable standard detectors, Solar Light provides absolute spectroradiometric analyses.

Services Include:

  • Spectral light transmission characteristics of a material
  • The spectral response of a detector
  • The spectral output of a light source

    Test and Measurement Standards

    including, but are not limited to:

    *      ASTM G155-07           “Standard Practice for Operation of Xenon Arc Apparatus for Exposure of Non-Metallic Materials.”

    *      ASTM D 2565             “../ Xenon Arc Exposure of Plastics Intended for Outdoor Use”

    *      ASTM D4329-05         “../ Fluorescent UV Exposure of Plastics”

    *      ASTM D4674              “../ accelerated Testing  for Color Stability of Plastics  Exposed to Indoor Fluorescent Lighting and Window Filtered Daylight”

    *      ASTM D5071-06         “../ Exposure of Photodegradable Plastics in a Xenon Arc Apparatus”

    *      ASTM D5208-09         “../ Fluorescent Ultraviolet (UV) Exposure of Photodegradable Plastics”

    *      ASTM E1347              “../Color Analysis

    *      ASTM Method E313    ”Standard Practice for Calculating Yellowing Index”

    *      ISO 4892                    “UV Exposure: Plastics – Methods of Exposure To Laboratory Light Sources”

    *      ISO 11341                  “Paints and varnishes – Artificial weathering and exposure to artificial radiation – exposure to “filtered xenon-arc radiation”

    Test and Measurement Equipment

Solar Light Company, Inc.’s Testing Laboratory is complete with state of the art simulators, radiometers, chambers, lamps, and controllers, ensuring our ability to easily process nearly any testing application, material, or special requests customers may have. Our hardware includes:

Light Sources

  • Solar Light Model 16S-150-003 Short Arc Xenon UV Solar Simulators
  • Solar Light Model 16S-300-003 Short Arc Xenon UV Solar Simulators
  • UVA Fluorescent lamps
  • UVA+B Fluorescent lamps
  • UVC Fluorescent lamps
  • High Intensity Visible Fluorescent lamps
  • Solar Light Model LS-1000 6” Air Mass
  • Solar Light Model LS-1000 6” UV Solar Simulator


  • Solar Light Model PMA2100 dual channel datalogging radiometer
  • Solar Light Model PMA2107 UVA+B Sensors
  • Solar Light Model PMA2110 UVA Sensors
  • Solar Light Model PMA2144 Class II Pyranometer
  • Hunter Lab Model CQXE Spectrophotometer
  • Optronic Laboratories Model 750 Double Grating Monochromator System
  • Optronic Laboratories Model 740 A/D Double Grating Monochromator
  • Optronic Laboratories Model 730A Radiometer
  • Optronic Laboratories Model 740-1C Controller
  • Optronic Laboratories Model OL 220M Quartz-halogen lamp
  • Optronic Laboratories Model 65DS Precision Current Source
  • Solar Light 290SPF UV Transmission Analyzer

Controlled Environmental Test Equipment

  • Stability Environments Controlled Temperature, Humidity & Light Walk-in Chamber
  • Stability Environments 33 cu ft Controlled Temperature & Humidity Reach-in Chamber
  • Tenney Environmental Chamber


Procedure to send Materials and Equipment to Solar Light for testing:

1. Complete the “Materials Testing Form” and mark box “Attn: Materials Testing Laboratory”.

2. Issue a purchase order or include payment information.

3. Provide specific shipping instructions for the return shipment and fax or e-mail P.O. / Return Form to Solar Light Company and

4. Enclosed a copy of the “Materials Testing Form” in the package with the instrument along with price quotation.

Ship prepaid via UPS or FedEx, fully insured to:

Solar Light Company, Inc.
100 East Glenside Avenue
Glenside, PA. 19038 USA
Tel: 215 517-8700
Fax: 215 517-8747

Send to: Attn: Materials Testing Laboratory


1. If the customer is from outside the United States, mark shipping documents/commercial invoice with:
“U.S.A. Goods being returned to the manufacturer for repair and re-shipment back to us.”

2. Solar Light will inspect the instruments upon received and will advise and obtain approval of testing before proceeding with the work.

3. Solar Light standard payment terms are: Payment in Advance (before shipment) either by major Credit Card with 1.5% surcharge or via bank wire transfer