I have a 79 Spider. My speedo and tach guages are so dimly lit, that I can hardly see them at night. The bulbs are bright and in good position. Is there anything anyone on the site that has a solution to this??
Many Alfa owners have complained about this as well. While there's no simple solution I know of, here's a link to what I finally did to deal with the problem. Its a project, but had very effective results.
I have a good friend with a '69 Spider that scored 99.6 points at the most recent National Concours, and that car has always been well cared for (he's the original owner) even though he does drive it. Needles to say, he's a meticulous person, and his instruments are as bright as any new modern car. I asked him about his instruments and he explained that the original bulbs will and do become dimmer with time. He also explained that there is no need to do anything special - just replace the existing bulbs with modern ones, and clean the lenses. He actually contacted Sylvania, and got the correct replacements for all the instrument bulbs. Modern bulbs are much, much, better than what came with the car, and he's not expecting to have to replace them again.
I would try these suggestions. They may be sufficient.
I had little luck with the brighter bulbs. Depends on what condition the interior of your instrument cans is in for reflective lighting. I had to go all the way to 20 watt halogens to get it bright enough. These made the exterior glass and chrome bezel too hot to touch. Ratcat is right though about getting the light source further into the case. The 20 watt bulbs were tubular shaped and stuck well inside. All this is how I ended up with an LED source (cool) completely inside the can.
The small gauges have little room to have anything protrude further into the case though.