Hello everyone,
I'm in a automation class and we're trying to configure a Konnected system with lights to connect to a Hue Bridge. When the alarm system goes out, the lights turn red. But we are unable to flash them. As in the picture we detect the lights everywhere except in the part to flash them... If someone has a solution it would be very appreciated, Thanks.
Flash is a command that is either built into the driver, or it is not. If there is not a Flash on the device command page, it is not supported. Your screenshot is showing you the only devices that have flash as an option.
You would have to flash manually, with on, wait, off, wait for as many times as you want to flash. You can look for other drivers that work with the bulbs, but also have flash available.
What are you using now for a driver?
Thank you for the answer. 
I think we use Philips Hue drivers. If this is the cause, it is special, because the rest of the class managed to flash them.
That is odd. All of my Hue lights show up in the list along with other devices that have flash capability. Are you using the official Hue integration?
Yes thats Wird 
And yes to we use the official Hue Integration.
As @user2574 mentioned, the flash commands should be available in the device command page. What do yours show? Also, what driver type is listed in the device info page?
What platform version are you running? Starting with 2.4.0, Hue bulbs implement some flash-related commands, but they do not implement the "Flash" capability, so it depends on what the app you're using is looking for. (The command is a bit weird on Hue in that it doesn't really go indefinitely as one might expect based on other devices' behavior, so the capability wasn't specified for this reason...)
Along those lines, knowing what app this is may also be good.
Download the Hubitat app
