Car Accessories Neon Lights

Are under-car neon lights legal EM?
Hi. I intend to either neon or LED lights under my big SUV. Im wondering if they are legal in Massachusetts in spite. This will determine if I need to buy the switch for them to install it on my accessory panel, so if they are illegal and a cop comes on my radar detector, I can quickly extinguish. Thank you.
My friend has on his car in MA but no there not legal. It has a switch for them though.
2 x 6″ HIGH BRIGHTNESS BLUE NEON LIGHT FOR CAR i18


