This is and example of Werma Stack Lights EVS Lights vs the Werma LED flash models and you will notice that the Werma EVS is much more attention getting. They are demonstrating with 70mm Modular WERMA stack lights. We recommend using the Werma EVS when it is very important to give a visual signal about a situations or status.
![](https://i.ytimg.com/vi/GoR53Xx05VI/maxresdefault.jpg)