Flsah Technology White Obstruction & Tower Lighting - SPX Corp -- Description: -- White medium intensity tower lighting is referred to by the FAA nomenclature as a D-type tower. White medium intensity lighting systems utilize white lighting in day and night mode. White lighting systems are approved for use on towers above 200’ and not more than 500’. Flash Technology offers a white system for D-1 and D-2 towers in either Xenon or LED configuration. This section details our White L-865 obstruction lighting systems. We offer white 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.