On the 13.5 ultra thin can you do red white and blue leds as a color option?

Hello, sorry, 13.5'' is too short to be made to 3 color sections. It could only be made 2 colors at most. The 20'' one can be made to 3 color sections, order link: https://www.vividlightbars.com/collections/ultra-thin-single-color-strobe-light-bar/products/20-54w-ultra-thin-single-color-strobe-light-bar

Does this do strobe and spot?

Hi, Thanks for your inquiry. Yes, you can check this video link: https://www.youtube.com/watch?time_continue=10&v=bJmoY2aHPQ8&feature=emb_logo