dual bright leds

ok im new here so please bear w/ me. i have a couple ?s i would like answered if possible.

1. how do they do the leds so they are 2 different brightnesses? i am makin taillights and i see every1 use 2 sets of bulbs. i want to use 1 set.

2. what is a good brightness to use for tails? i was goin to use 10k mcd. then if i used 2 sets 6k mcd and 10 k

Experimenting with different value resistors won't hurt anything.

There are too many variables for me to determine what constitutes "a good brightness". Simply try different resistor values until you are happy with it (and law enforcement as well)

Good Luck

Oh..and "microfarads" should be expressed has "mfd"   or  "uf"

"mcd" doesn't really mean anything.

Keep us posted on how the leds work out and feel free if you have any more ?'s.

how would i do that? run different resistors from the tail wire and brake wire?

also, whats the difference in inverted and regular leds?

The answer to the first question is "Yes".

You want more resistance on the tail so when you hit the brake the leds will be brighter.

The only difference I believe with inverted leds is that they are brighter. If you want more info on inverted leds do a google search and knock yourself out.

You will need different resistance values for each brightness you want.  You can run ~5K ohms to the LEDs when you want them to be brighter you would run them through a 500 ohm resistor.  (values are random, testing/data sheets will need to be used to determine correct resistance values).

mcd refers to millicandellas, a measurement of brightness.  He was not referring to capacitance at all.

Opps sorry had a brain fart with the capacitance, don't know what I was thinking.  doing too many replies at once and getting confused..lol

Anyhow, let me know if you think this diagram will work. I used diodes to isolate the turn/brakes.

led_tail_lamps.jpg

Wait, This diagram makes more sense to isolate the tails from the turn/brake.

led_tails_revised.jpg