I tried to get my club's adviser to buy HPL 575/115v or x but he wants the long life lamps since we got through a lot of them and he doesn't want to deal with ordering lamps every month.
Our school orders lamps only about 3 times a year, at the beginning of the year, before Christmas break, and then some time in May.
I believe that the HPLs that are in our new fixtures at this point are Ushio 575/115v. We about 20 Source 4 PAR MCMs that are lamped with Osram 575/120X lamps and used as house lights. Now the fact that they are house lights is beyond my knowledge and makes absolutely no sense to me.