Here is my WHOLE lamp collection. Excluding my Regent 175w MV.

From left to right:
Sylvania 400w Metal Halide, Clear BT 37
General Electric 400w Mercury Vapor, Clear ED 37
Phillips 400w HPS, Coated ED 37
Sylvania 400w HPS, Clear ET 18.
Phillips ALTO 250w HPS, Clear ED 18
Phillips ALTO 400w HPS, Clear ED 18
Phillips 400w Metal Halide, Clear Cram ED 28.
Phillips 250w Mercury Vapor, Coated ED 28.
Sylvania 150w HPS, Clear BT (... Number?)
That is all on the picture.
THe one NOT in the picture is:
Regent 175w Mercury Vapor, Clear ED 28.
Enjoy my lamps!