Low voltage,Edison base

[Scott]

I was wondering what this bulb was used for-I have a 25 watt,edison base 6 volt bulb. As far as I know,it's good. I continuity-checked it, but have never fired it up since I don't have a low voltage power supply with enough amperage to light it(a bit over 4 amps). Just wondered. Marine use,maybe? Scott

Most likely your bulb was intended for marine and camper (R.V.) use.  Such lamps are still made in various sizes, in both 6 and 12 volts.  If you bulb is older, it may have been used in a farm light plant system.  32 volt systems were the most common, but 6 volt systems were available for the economy-minded.  Sometimes the "light plant" consisted of just a battery that the farmer would charge when he drove his car into town.