Where should you buy LED Lights for your robot? And is music on your robot legal?
If you are using V4, you are allowed to play music with the VEX Speaker. The VEX Speaker does not work with V5 and it is discontinued, so you will have to get it from a 3rd party such as another team. Other than that, non-VEX speakers are not legal. In terms of the LEDs, you can find some good information here.
Hopefully this answers your question