Old 1972 DC light bulb
I am tearing this shroud apart and going to just use the fan box.
It has a light bulb the size of a house lamp, but it is DC! It works
It has a light bulb the size of a house lamp, but it is DC! It works
Forum Discussion
- Kinda common , it is called a medium base Edison 12 volt bulb .
- Huh, All the 12 volt bulbs I've ever come across were a different base. Learn something new everyday I guess.
twodownzero wrote:
I don't think a light bulb cares what kind of current is flowing through it. It's a purely resistive load.
True for the old incandescent types but it does care about voltage. The standard house lamp is 120 volts. The DC lamps are 12 volt so you plug a 120 volt lamp into 12 it will be very very very very dim.
Most every hardware and automotive store sells standard edison base (Screw in) bulbs that look for all the world like a 100 watt 120 volt bulb till you read the label. 12 volts. they are usually rough service designed for drop lights (trouble lights) I have one around here somewhere.- I have had a bulb like that for years. Replaced the plug off a drop light cord with a pair of clips.
Not as handy as I thought it would be, but better than most lights that where available at the time ajriding wrote:
ok, Ill toss in trash then.
I thought it would blow if put in a 120
If it is a 12 volt bulb, regular screw in base and you put it in a 120 volt lamp, it will work for about a milli-second, then you will throw it in the trash.
Kenajriding wrote:
ok, Ill toss in trash then.
I thought it would blow if put in a 120
Yes, it would be ruined if you applied 120 v to it.- ok, Ill toss in trash then.
I thought it would blow if put in a 120 - 12 volt blubs are common place.
- Incandescent bulbs operate on AC or DC, just as long as they are the correct voltage.
In a lot of the substations I work in, there is an emergency lighting circuit that has a bunch of 100W bulbs connected to the 125V battery back (~130V float). In the event of a station outage (loss of station service) we can turn on the emergency lighting powered directly by the battery bank.
Nothing special about the bulbs, just your typical 100W 120V. - I don't think a light bulb cares what kind of current is flowing through it. It's a purely resistive load.
