[QUOTE=mbzr4ever;1629717]I'm putting an order in for the festoon replacement for my w123. Sure could use more light in the instrument panel - supposed to replace with 194 but there are so many different styles:
http://www.ledlight.com/detail.aspx?ID=132
This is the bulb I bought for the instrument cluster..expensive yes, worth it YES!
194 super flux led 5 leds side firing and one top #45689
Very bright, better then even a new clean OEM bulb by FAR.
Low heat output, no melting, no burnig light paths with 5w blue bulbs, been there, done that...no good.
I was skeptical since I have been trying LED bulbs for some time no and have never found one until now that I have been happy with.
The 194 socket led bulb is from
www.LEDLight.com
The 4210 42mm festoon hi power LED bulb is from
www.superbrightleds.com
Also, I noticed that LEDLights.com has a similar festoon bulb,
#54565 and #48756 I know the 48756 will fit , It is a true 44mm bulb also. It has 9 hi flux leds instead of 6 and looks even brighter but it is a bit more expensive, the 54565 needs to be checked to see if it fits both the light housings in your cars.