Your cop sirens will be alot brighter and visible further down the road using my visualsettings.dat file.
I included my own visualsettings.dat file which has improved lods for ped models(great for addon Peds or replacing peds with HQ ones downloaded from here) I made the car lods slightly higher. Some of the color values in visualsettings.dat are from Kevin56436 check out his mods for realistic hid lights. I am using my own custom made visualsettings.dat file which has values alot higher then Radiance V or VisualV sets them to so your taxi ads will not be bright since mine are perfect. As you can see in the pics they are nowhere near bright or so blinding you cant even see the ads themselves. When you use Radiance V, VisualV, or any mod that comes with its own visualsettings.dat file you will have massively bright taxi ad signs.