wrote in message
oups.com...
There is a question:
We produce ALT, ASI and VSI in mechanical instruments. We don't know
whether customers need a light which it can be seen at dark. Our
products are without light now.

Luo
http://www.ming-da.com


If the design of the case and the scale allow it, you could add value by
having a lighted option.Westach sells add-on lights that can be inserted
later.

Also consider if your instruments are allowed for IFR configurations. If
they are for day-VFR only then there's little need for lights.

Rob