Awl --

Got a cupla 70 W jobbies to light up what the city won't light up, and after
about a year, one goes off, on, off, on with that whitish glow, rather than
the sodium yellow.
Is this the bulb going bad, or the ballast? What pita, given how high they
are mounted.

The sodium is perty neat, tho, as they are about 7x more efficient than
incandescant, and the yellowish lite is soft-ish.
The bulb also supposedly lasts a really long time.
The bright white parking-lot type lites are metal halogen, about the same
efficiency, iirc, but the fixtures are about double the price of the sodium,
as are, probably, the bulbs themselves.
--
EA