For seven segment LED stuff, I'm partial to the classics - red, green and yellow/amber.
My favorites remain nixies, followed closely by Panaplex. Incidentally, the Panaplex stuff I have all has them filtered with red rather than amber.
This image is a bit blown out exposure-wise, but shows the red filtered Panaplex:
![](https://photos.smugmug.com/Electronics/Data-Precision-3500-DMM/i-HxtzbqG/0/16c4b4be/L/Data%20Precision%203500%20front%20panel-L.jpg)
And this is a bare three digit Panaplex display:
![](https://photos.smugmug.com/Electronics/Data-Precision-3500-DMM/i-GM3pZh8/0/0c16ae0f/L/SP-353%20Panaplex%2001-L.jpg)
I also prefer the 'dot' style LEDs that HP used to use to more conventional seven segment units:
![](https://photos.smugmug.com/Electronics/HP-8662A-Synthesized-Signal-Generator/i-DsHJQVs/0/d84d67e0/L/HP%208662A%20displays%2007-L.jpg)
I think it's wonderful that blue LEDs were developed, but would like to string up the designers/marketers who insist on using them at eye searing brightness on EVERYTHING! It's supposed to be an indicator, not a cutting laser!
-Pat