In , I, Don Klipstein wrote in part:

I have heard of some sodium lamps for use on some metal halide ballasts
- use only ballasts indicated as compatible by the lamp manufacturer.

I think I got that one backwards, as in there being metal halide lamps
for sodium ballasts. Use only a ballast having an ANSI ballast
compatibility code mentioned by the lamp manufacturer as compatible.

- Don Klipstein )