getting ready to do my climate control Options

[Zimluura]

i'm getting ready to do my climate control in blue leds.

i'm thinking that for *each* of the 3 special toyota bulbs in the unit i can maybe put in 3 leds in a series cluster with a resistor (so 9x 5mm leds providing backlighting and 9x 3mm leds for each active button indicator). does anyone know what voltage those special bulbs normally get. i'm sorta assuming 12v is safe (though my voltmet4er says my cig lighter is 14v).

at 12v my resistor calculations...
http://metku.net/index.html?sect=view&n=1&...dcalc/index_eng
...are telling me a 68ohm resistor for each cluster is the way to go.

i've got a little bit of experience with electronics. but mostly just replacing leds that are already in there. does this raise any red flags for anyone? does it sound like a good idea (to improve light dispersion)?

also i don't know much about power ratings, but i'm assuming that everything is fine if the power rating of the resistor is greater that what the led calculator says the circuit requires. can anyone tell me if this is an accurate assumption?

thanks in advance

[snadman]

Maybe they do make those, but most I see like that are because the resistor is a variable resistor built in to the power source...and they are specially made for accent lighting in cars...such as those stupid leds kids put all over their cars. The variable resistor is built in to the cigarette lighter adapter.