Case Study: How One Light Guide Solved an Auto Supplier’s 5-Part Challenge

Posted by on Aug 11, 2025


Why import five separate parts when one light guide assembly can do the job? My team posed this question to a Michigan-based importer in the automotive industry that grappled with rising costs and the operational headache of sourcing five separate parts from different suppliers. New tariffs quietly eroded their profitability, but just as pressing were the logistical tangles and inconsistent quality from juggling multiple partners.

When the future seemed dim, we helped them turn things around, not just with a custom light guide but also through a supportive partnership.

The Challenge: Managing Multiple Vendors

This importer, heavily invested in delivering precision-engineered lighting solutions to automotive customers, saw its cost structure destabilized almost overnight. Tariffs increased part costs, but the deeper issue lay in managing a supply chain stretched across multiple vendors. Lead times ballooned, quality checks multiplied, and the once-predictable production schedule turned unpredictable.

They needed an expert ally who could rethink their approach to the situation.

The Solution: Custom Light Guide Design & Assembly

My team stepped in with a consultative mindset, not an off-the-shelf answer. We proposed transforming the process from importing five separate parts to producing a complete in-house assembly in our facilities.

Our long history of assembly and processes with backlights, coupled with pattern manufacturing and light guide design, created a more complete assembly or module than other manufacturers can provide. This strategy helped reduce costs while increasing efficiency and quality.

Automated and semi-automated lines reduced human error, while AI-driven quality assurance systems ensured every part met the client’s demanding standards. By consolidating everything under one roof, the importer no longer had to manage multiple relationships or navigate complex logistics.

The Results: Stabilization & Efficiency

The impact spoke volumes:

  • Reduced costs: Tariff-related expenses were reduced through the integrated assembly solution.
  • Greater efficiency: Simplified supplier management shortened lead times and freed up resources.
  • Consistent quality: Proprietary light guide technologies and automated processes produced reliable, high-quality components.

Lessons Learned

This project reinforced an essential truth: listening deeply to customer needs and tailoring solutions around those realities unlocks lasting value. By combining design, manufacturing expertise, and consultative partnership, we adapt our approach to a unique challenge and help customers thrive despite external pressures.

At Global Lighting Technologies, we see ourselves as more than manufacturers—we’re collaborators, problem-solvers, and partners. This project shows how, by combining advanced light guide technology and end-to-end assembly solutions, we can help customers overcome even the most unexpected challenges.

As markets shift and new hurdles emerge, our commitment remains: lighting the path forward, together. Connect with our team to bring your bright idea to life.

We bet you have a bright idea.

Let’s see how GLT can help make it a reality.

For even more information about GLT, view our company presentation at the link below.


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