Stilo Standlights for LEDs

Hello, I drive a Fiat Stilo 5 door, which is why I can’t use the Dayline headlights often used at Stilo (only 3 doors). Now I wonder if it would be possible and legal to exchange these light bulbs which are in these blue “cups” through bright LEDs (white, but also like blue for example). I would certainly be much cheaper than the 600 € for 2x Dayline and I like the effect even better. I saw this in a YouTube video, only there is the all Stilo modified so strongly that the 100% is not allowed to drive on Germany’s roads:http://www.youtube.com/watch?v=7RrADbbrf8A The blue is the hammer! Does someone know what? I am grateful for every help that my Stilo discreetly spices up^^