I currently have the Lionel Fire Car that needs a bulb replacement. The revised instructions says I need the 10-8411-530 bulb as a replacement which is listed as a 6 volt bulb. My grandson and I run the train at about 10 -12 volts thus the bulbs life is shortened. My question is can I get away with using a 257-300 blinker which is a 14 volt bulb? I don't car if it blinks dimmer I just don't want to melt the foam insert that holds the bulb in or melt down the red plastic dome if we go with the 6 volt replacement and run it at a higher voltage.