Hello is there any way i can make my sirens longer like in real life? i mean that i can see blue and red color from further. Because for example radiance V only makes these lights brighter but thats not exactly what im looking for. Anybody knows how to do it?

Oh, you are talking about the look of the emergency lights from a distance?   Sirens refers to sound/audio so I was a little confused.  I think you can do that with adjusting the settings in the ELS ini folder, if you use ELS.  I don't know exactly how to do it but someone else should be able to help you with that.  There some files you can download on here under the "visual" tab that adjust the ELS settings for you. 

thank you bro. if anybody wants to know you just need to change the lines that end with_RNG in the ELS.ini file