"rgrgrgr" wrote in message
...
I need to replace a Metal Halide lamp in a light fitting. The bulb is
marked:
SYLVANIA METALARC HSI-TD 150W/NDL UV-STOP. It's about 130mm long.

None of the Internet retailers I already have an account with stock this
exact lamp, so I'm trying to figure out what other lamps might be
compatible. Does anyone know if one of these would work?

http://uk.farnell.com/osram/h150nd-h...50w/dp/1528728
(seems compatible but this lamp specifies a 90V supply - does the light
fitting contain a transformer?)

http://www.screwfix.com/prods/25381/...L-RX7S-24-150W
(seems compatible, but claims to be 180mm long - a typo?)

Wilkepedia has some interesting info on Metal Halide Lamps including a large
paragraph on Spectral emission (Colour Temperature)

Don