LED resistance question

[CarlW]

Having a bank of 16 bulb sockets, each with a separate positive feed and a common ground. Initial plans is to put the appropriate resistor into each positive feed. But got to thinking, what if I put a resistor in the ground side of the circuit?

Is this for a lighting project or a pachinko project? Are these the screw in bulbs from China that are sold as 3V / 6V / 9V / 12V?

Does your bank of bulbs just turn on for a second occasionally or on all the time?

Do any of my questions really matter?

Just curious.

Here is a link to a resistance calculator...
LED Resistor Calculator

Goal is to not turn them into Dark emitting diodes...

[mxfaiman]

Goal is to not turn them into Dark emitting diodes...

[pachiwall]

Is this for a lighting project or a pachinko project? Are these the screw in bulbs from China that are sold as 3V / 6V / 9V / 12V?

Does your bank of bulbs just turn on for a second occasionally or on all the time?

Do any of my questions really matter?

Just curious.

Here is a link to a resistance calculator...
LED Resistor Calculator

Goal is to not turn them into Dark emitting diodes...

It is for an arrangeball machine. The voltage is 31.1 volts DC. If I reverse the leads reads -31.1. If I switch the reading to AC I get 0.1 when red is on the common ground and black to voltage feed side. If I reverse the leads, and put black to common ground side, and red on the voltage feed side...I get 67.8 volts! This is a different LED calculator than I was looking at before...but still brings up questions.Supply volts are 31 volts. The forward voltage is labeled "voltage drop across LED" in the space where you fill in the blanks. I have NO IDEA what the voltage drop across the LED would be. And the current box says "desired LED current"once again I have NO IDEA what information to enter.
Yes these are the e10 base screw in ones from CHINA. There are no specs with them. They came in a zip lock bag, I had to look at my purchase history to see that voltage they were so I could write it on the baggie.
Have you used these bulbs in any of your projects? If so, how do you feel about them? I have not even tested one yet. I am curious if they are a different brightness with each voltage step.