>Apparently RED leds are a big no-no on commercial equipment;
>perhaps the OGB selection is for that sort of application?

This may be due to CE certification, and similar rules elsewhere. I did a 
unit that used a red neon indicator as a power indicator, and had to change 
it to a green LED to get by the certification fellow who was checking for 
CE.

Red must only be used for an emergency alarm AIUI. 

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