SOT: electrical gurus check in..., how to dim LEDs? Options

[dlo914]

So i've retrofitted some LED rings into my daily driver, but i'm only using the LEDs as the running lights and using the filament bulb when brakes are applied. how would i go about using the LEDs for both running and braking light usage? i know i'm suppose to add a resistor to each positive LED wire, but i'm so confused as to what OHM rating or % etc i'm suppose to use. The guys at two radioshacks were useless.

Here's how they look at the moment:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i62.photobucket.com-2697-1354257938.1.jpg)

[914pipe]

So i've retrofitted some LED rings into my daily driver, but i'm only using the LEDs as the running lights and using the filament bulb when brakes are applied. how would i go about using the LEDs for both running and braking light usage? i know i'm suppose to add a resistor to each positive LED wire, but i'm so confused as to what OHM rating or % etc i'm suppose to use. The guys at two radioshacks were useless.

Here's how they look at the moment:
(IMG:http://www.914world.com/bbs2/uploads_offsite/i62.photobucket.com-2697-1354257938.1.jpg)

You could use a potentiometer (a volume button from an old radio, analog to be spesific, is a potentiometer) since the potentiometer is just a variable resistor. When you find your desire light intensity you can use a multimeter to find the resistance (ohms) on the potentiometer . After that you can buy a resistor that would be near the ohms you need or you just can leave the potentiometer fixed.

Is as simple as positive wire to one end of the potentiometer and the other end will distribute the power to the leds positive side (since this is for the non brake light).

Here is a simple diagram without engineering or electrician symbols excepts for the ground symbol (electrical engineer typing).

Hope this help.