So I've managed to get hold (legally, I may add!) of a signal head to use for training purposes. The signal is fitted with these LED lamps. I've got them to light with a 12v power supply, but is that the correct voltage for the lamp? Is there a name for the socket that the bulb fits into? So far I've only managed to get the lamp to light using the spade connectors, rather than the connectors at the base of the lamp. If anyone has any pointers as to the best way to get the bulb to light, please let me know!