Earlier this week I had a discussion with two other rental company owners and the President of a theatre production company that owns five small theatres and successfully produces their own shows. The topic was the merits of using long life lamps or the high output lamps. Many times on Controlbooth I read links on the light output from different fixtures etc. I will not repeat these discussions. However my operation is small rental house and is not my primary source of income whereas for the others it is their only source of income. I normally lamp my fixtures with HPL575 or GLCs and also the BTH575 because I like the light output and quality. All the others are now using HPL575X, GLA and are staying with BTL because of lamp life. Here it is if they lamp the same as me then their lamp costs increase by a factor of 5, they changed to the long life lamps and the customers did not notice any change in light output. Before everyone tells me you can get the lamps cheaper - we are not buying lamps in small quantities between the four of us we spent $68k in the last year and we are not paying the same price as the average user. In fact we supplly the average users with lamps in this area. In the last year my three colleagues have switched to the long life versions except me as I have a number of cases of lamps to work through but I shall probably follow the same route. The high output (short life lamps) are only used for special applications. Here is my question is this the experience of other rental company owners and users in other parts of North America?