I may want to put some LED pod lights on Lin's bike to make it easier to see from the sides at night. What are LED pod lights? How do they work? Run off bike battery? Own power source? How do you turn them on and off? How do you attach them to the bike? What's the deal with using blue ones in regards to them being Police and emergency color coded? Does anyone know of a shop in Sydney that a wide selection to choose from? Thanks in advance: Jaq.