I am building a guitar pedal which uses an LED to indicate whether its bypassed or not. i have some really nice looking dialco 12v lamps which i would like to use but i'm not sure if they would work in place of the led. i know that replacing a lamp with an led is possible but not sure about vice versa. now on the pedal, there is 1.5k resistor attached to one of the leads of the LED and im not sure as to why. figured id mention that as well. will this work?