Several have replaced their #194 instrument panel bulbs (in the cluster, which back-lights the gauges and such) with LEDs and have posted pictures "before and after". NO use of "strips", though, just individual bulbs. HVAC and radio have their own smaller bulbs which might be converted to halogen as there is not a universal "light engine" that powers those illuminations via optic cables. Seems like the source for the #194 bulbs replaced was
www.SuperBrightLEDs.com ?
In some cases, the reflectors of the bulbs in the cluster, plus the existing bulbs themselves, can become dusty with time, which reduces their light output. Light output which is basically designed to not be too bright, but bright enough to see the numbers on the gauges and speedometer. Rather than going into the LED world, more benefit might be to remove the cluster and gently clean it all up inside to restore it to "as produced" pristine-ness?
The LEDs will also need to be "dimmable", which not all seem to be. That allows the benefits of long-life and still keeping the instrument panel lights from not beeing so bright that they are distracting and might cause issues when being in a "high-contrast" light situation, by observation.
Don't forget the dome lamp and map light! Which should be brighter than the instrument panel lights, to me.
Just some thoughts and observations,
CBODY67