About Us
Compatible optics, backed by people who know networks
Twenty-plus years in fiber
FluxLight has sold transceivers, cables and media converters since 2003. We're a family-owned company in Dallas, Texas. Network teams at small businesses, universities, government agencies and Fortune 500 companies buy from us. We sell parts that work in their switches, cost less than the OEM's, and come with support from people who understand them.
- In business since 2003
- More than 10,000 customers
- 30,000+ orders shipped
- 1,000,000+ units sold
Built to work in your gear
Every transceiver is coded for the platform it's sold for, so your switch reads it like an OEM part. If a part fails, we replace it. Our warranty runs three years from delivery and isn't prorated. New, unopened items can come back within 30 days for a full refund.
Our team has worked in optical networking for decades. Our founder spent more than 30 years at Alcatel, Fujitsu and ADC, holds optical patents and has served on ANSI and ITU standards committees. When you call with a question, an expert answers.
- Coded for your platform
- 3-year full replacement warranty
- 30-day returns on unopened items
- Technical help before and after you buy

Trusted by IT teams inevery sector
We supply enterprise networks, data centers, schools and universities, and federal, state and local government. Buyers order online with a card or purchase order, or ask us for volume pricing and lead times on larger projects. TAA-compliant parts are available for government buyers.
- Enterprise and data center
- Education
- Federal, state and local government
- Volume quotes on request

Our team

Tony Farinholt
Founder and CEO
Tony has worked in optical networking for more than 30 years, at Alcatel, Fujitsu and ADC Telecommunications. He holds several fiber-optic patents and has served on ANSI and ITU standards committees.

Denise Farinholt
Founder and CFO
Denise co-founded FluxLight and runs its finances. She began her career in artificial intelligence at TRW, building early natural-language systems, and designed FluxLight's first website.

Dominic Farinholt
Vice President
Dominic runs FluxLight day to day. He joined full time in 2010, after earning a degree in business management from the University of North Texas. He oversees procurement, quotes, shipping, returns and the testing of incoming stock.

Mark Mulvaney
Director of Operations
Mark joined FluxLight in 2021 and is Director of Operations. He oversees how the company runs and improves its processes as FluxLight grows, with a focus on efficient work, dependable service and satisfied customers.

Mark Farinholt
Director of Marketing
Mark runs FluxLight's website and marketing. He came to FluxLight from a career in web and graphic design, and now leads the company's brand and online store.
