Powerful RGB LED for outdoor application

Hello,

My application is to make RGB LED road bumper

Can you tell me what is the best RGB LED bulb that is compatible with Arduino ? and it is powerful enough to work outdoor and anyone can see it and notice its color during sunlight time ?

Thank you.

No high power LEDs are "compatible" with Arduino because it can only supply 5V at 30~40mA. But neither are these LEDs "incompatible" with Arduino. It is a matter of finding the best "driver" to sit between the Arduino and the bulb. Tell us more about your requirements for the project. How many Watts? How many colours? Also please explain what a "road bumper" is.