Strobe lights?

It's easiest to upload to YouTube and just paste the link here. It'll auto embed

 

https://drive.google.com/file/d/0B8ula9JB3dw3N1cyajlqMU4wZ0k/view?usp=drivesdk

 

Just get a switchpro and add some a pillar or roof lights... it has a strobe option

 

I did consider that for my situation, and it may still be possible, I just want to find out first if it's possible to get a bar that is solid white, and then strobes blue. I may end up with a SwitchPro anyway for my other stuff.

Odd that I emailed three vendors this morning, one of which is pretty active here, and didn't hear back from any of them. I wasn't expecting a 5 minute response, but I figured sometime throughout the day they'd get back to me.

 

They're a little pricey ($45 each) but I installed the green version of this in the headlights of my dads F-250 (Dirt work truck, fairly frequent blocking of roads while loading/unloading equipment) and I was happy with them, the green is a little difficult to see in the day but it lights up pretty darn good when not in direct sun.

FLUX Bolt Emergency Vehicle LED Hideaway/Surface Mount Strobe Warning Light (Green/Green)

https://www.amazon.com/gp/product/B01G6LU9L6/ref=oh_aui_detailpage_o00_s00?ie=UTF8&psc=1

https://youtu.be/DfXPJpslVz0

 

Rigid Industries 22000 White 20" Radiance Backlight Light Bar

Comes in a bunch of different color backlight which are separately controlled...