Flsah Technology Red Obstruction & Tower Lighting - SPX Corp - Description - Red tower lighting is referred to by the FAA nomenclature as an A-type tower lighting system and is used only at night on towers up to 2200’ (A6). This section details our red L-864 and L-810 obstruction lighting systems. We offer red Xenon and LED systems that can be used in medium intensity and high intensity applications. Catenary systems are also available. Our products are ETL certified and are widely used throughout the United States, Canada, South America, and Europe. Please review our products page and contact us if you have any questions.