I've tried pretty much all of the options mentioned above (apart from the hat!) over the course of three 944s and a few years.
The FlamingEye kit gives the best results, but the Jager Engineering one is a very close second. Resilvering the prisms is a big waste of time, as is dropping in LEDs to the existing bulb sockets.
Where the original bulbs reflect through silvered prisms and then up on to the instruments, both the FlamingEye and Jager kits remove the prisms entirely and shine LEDs directly up on to the lights. They will always be brighter and more effective than the original setup, whatever bulbs you put in there.
I can only assume the original layout was intended to make the illumination more diffuse, and the FlamingEye kit manages to do that just fine anyway. The Jager kit is perhaps a little too direct, giving three distinct beams of light, but in my experience that's a small price to pay for being able to read the instruments very clearly indeed.
Taking the instrument binnacle out and fitting one of these ready made kits is a very simple process. With a bit of experience I've got it down to a twenty minute job, and I am definitely not the mechanical type.
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