Remember when i melted my Formed Plastics lens? I actually still have the lamp, but the outer glass is chipped from trying to remove the melted on acrylic, so I've never lit it since. It's wrapped up in paper towels, in a ziploc bag, and on a shelve in the back of the garage. The full-sized sylvania merc is my THIRD 400w mercury lamp and has lasted longer then the other two 400w mercury lamps combined. The first lamp I had lasted about 3 minutes lol.
They also make cram 400 watt MV lamps, but those are only the cheap china ones by Plusrite.
I have seen lamps like this 150 watt one at the ACE hardware store I get my cords. Speaking I need some more.. xD
I DO have a 70 watt lamp this size that came with my yardblaster (that is hanging outside but now converted to mogul base)
-400w merc
-320w PSMH
-70w HPS
-70w clear PSMH*
-70w coated PSMH*
The ones marked with a * are ones I still have.