In my case i have to watch all of these LED lights especially the ones that have built-in REGULATOR CHIPS... They all seem to interfere with my HDTV when using it in OTA mode and my HAM RADIO and WX RADIO units...
I tend to not add ones that I don't really need. All of the DOT SAFETY LIGHTS are all powered by my truck start battery system and I don't need to install LED Lights here on the trailer side with the saving of trailer battery power in mind when camping off-grid.
I have to admit however some of those LED DOT SAFETY lights sure look nice... I would probably worry about the LED lights not drawing enough DC current to FLASH at a proper rate when being used for turn signals etc...
I am not aware of the term HYPER-FLASH syndrome... Must not be something old school folks should worry about I guess hehe... Something else to read up on here I reckon to see if I have that illness or not...
Roy Ken