About IL

For over fifty years International Light has been developing products and solutions that meet a broad range of needs and solve a variety of challenges.  ILT combines technical lighting and light measurement expertise to provide products and services that shine.

International Light Technologies was formed when Gilway Technical Lamp merged with International Light.  Gilway and International Light have long and proud reputations for delivering exemplary customer service, on-time delivery, and technical expertise. Formed in 1969, Gilway Technical Lamp has provided customers with off-the-shelf and customized solutions for a full spectrum of light sources.  Since 1965 International Light has been solving the inherent difficulties in light measurement through the design and manufacture of a wide range of light measuring instruments, including the most accurate light meters on the market.

In February of 2022, ILT was acquired by Ocean Insight.  International Light Technologies offices, R&D efforts, certified state-of-the-art testing and calibration lab, warehousing and much of its manufacturing are located in Peabody Massachusetts, just 15 miles north of Boston.


Why should you partner with ILT to overcome your latest challenge?  Innovating and problem-solving are what we do.  We have over a half-century of experience working with companies of all shapes and sizes, and across a broad range of industries, to deliver products and solutions that tackle the toughest obstacles.   ILT employs a team of highly skilled experts in the areas of electrical, optical, mechanical, quality and manufacturing engineering.  Our staff will work with you to ensure you get a solution – whether off-the-shelf or tailor-made – that is right for you.  In today’s tumultuous environment where the big guys are struggling to keep up and many entrants come and go, ILT is continuing to deliver products and solutions that solve problems, are designed and manufactured to the highest quality standards, and can be brought to market quickly and cost effectively.

The Problems We Solve

ILT has been developing solutions for lighting and light measurement for more than 50 years.  We have an extensive catalog of off-the-shelf options, but the real benefit we bring to our customers is our ability to develop customized solutions that meet your specific requirements.  The following are our core areas of competence.  Click on the links to learn more:

Light Measurement Systems – ILT has pioneered highly accurate, industry leading light measurement systems for a broad range of markets and applications.    

Instrumentation and Sensor Light Sources – ILT offers a broad range of off-the-shelf and customized lamp and light source solutions including LED, Ultra Violet (UV), Infrared (IR), specialty replacement lamps, and power supplies.

LED Lighting Innovations – ILT offers LED lighting solutions for a broad range of applications.  We offer a comprehensive suite of LED modules and flexible strips for signage applications including channel letters, sign cabinets, retrofits, and architectural accent and cove lighting. In addition to our stock products, ILT can customize a solution to meet your specific needs.  ILT also designs and manufactures LED lighting solutions for freezer and refrigeration display cases, open case lighting, gas canopy fixtures and retrofit kits, under-cabinet lighting, task lighting, retrofits and more.  When an off-the-shelf product just won’t do, or when customization is required, our team will work with you to develop the solution that’s right for you.  Our experts can help you meet your design goals and provide technical expertise.

Calibration & Testing Services - ILT operates and maintains an ISO/IEC 17025:2017 accredited calibration lab on site.  We perform calibration and maintenance on all of our light meters and spectrometers.  Additionally we will perform NIST traceable, ISO/IEC 17025:2017 accredited calibrations on most optical meters from other manufacturers.  ILT will also perform testing on lamps, and transmission test on filters


Our Commitment to Our Customers

At ILT we are committed to providing our customers with the highest quality products, prompt and courteous customer service, and world-class technical support.  We realize that much of what we make ends up as part of a solution for our customers’ customers.  When you partner with ILT you can be confident that we will stand by our products and work through any issues to resolution. 

Our Commitment to Quality

ILT is committed to delivering the highest quality products and services to our customers.  Our employees use the latest tools to ensure all of our products are designed and manufactured to meet our stringent requirements for durability, reliability, efficacy and cost efficiency. 


To ensure that this commitment is understood, implemented and maintained, all of our employees are familiar with our policy and understand their requirements within the Quality System through training and access to our Quality Manual. We are an ISO9001:2015 certified organization for quality management, and all of our products are backed by a warranty.  ILT is also ISO13485:2016 certified.


ILT is an ISO/IEC 17025:2017 Accredited lab.  This certification allows us to calibrate ILT-branded and non-ILT branded light meters and spectroradiometers.  Visit our Calibrations page here to see all of our calibration services.

Our Commitment to the Environment

ILT is committed to designing and manufacturing products that are environmentally friendly and implementing professional practices that are environmentally sustainable.  The Directive 2002/95/EC on the restriction of the use of certain hazardous substances in electrical and electronic equipment (RoHS) was issued in February 2003. The RoHS directive restricts the use of the following substances in products sold into European markets from July 1, 2006:

  • Lead
  • Mercury
  • Cadmium
  • Hexavalent Chromium
  • Polybrominated Biphenyls (PBB)
  • Polybrominated Diphenyl Ethers (PBDE)


Light Sources Products:

All of our products are now fully compliant.

Light Measurement Systems Products:

Because our products are used as measurement devices there is an exemption on RoHS compliance. However, we are developing all our new products to be compliant, and retro designing our older products on an ongoing basis. We expect to have all our products fully compliant in the next few years.

If you have a question or a concern about a certain product please contact our RoHS Department for status on that product. More information on RoHS is available from the official RoHS website.


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