Sankyo Lumina Frame Light Bulb Type

[shnetinka]

I'm sure this is posted elsewhere put I can't seem to find any relevant info to identify what type of bulb is in these frames. I have a number of burnt out bulbs that need replacing, and the fact that these things ate 10+ years old it is surprising to me that there isn't more info about replacing bulbs.

Any help would be greatly appreciated in identifying these bulbs.

Thanks

Steve