Edwards 405-3A-T 30 Cd Synchronized Strobe405 Series strobes are specially designed for use with compatible life safety communication and control equipment to alert the hearing impaired of a life safety event. Strobes are available with 15 cd, 15 75 cd, 30 cd, 60 cd, and 110 cd effective flash intensity. They are fully compatible with Genesis signals. 405 Series strobes exceed UL synchronization requirements (within 10 milliseconds other over a two hour period) when used with a separately