Neon indicators on electrical items do not seem to last for a very long time. They just blacken. A LED would be a good replacement, but they do not work directly with mains AC voltage. Here are some options to consider.
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Following on from FoundationDB's graph store, they are now proposing a document store. Again, there is emphasis on 'ACID' compliance. So, unlike most other newcomers to the database scene, their database will support the protections familar to RDBMS database administrators. The database should be protected from interference and corruption, and benefit from protection of saved transactions.