Red marker/clearance light. Optronics strive to be the market leader in vehicular safety lighting in all of the core markets in which we compete through product/process innovation and a focus on end-user value. We will accomplish this by continually exceeding our loyal customer's expectations! Our dedication to product development has resulted in the broadest line of LED safety lighting in the industry. Product design and innovation is our core competency. Our in house art production department provides our multi-industry customers with constant, current marketing material to help drive their business and profitability.