As of October 2003, OSRAM has improved the HSD 575/72 lamp by lowering the start voltage to 1.5 kV. This solves the compatibility problems with magnetic ballast fixtures that we wrote about in May. See http://www.martin.com/service/showpage.asp?id=2887.
Improved lamps have the following or higher batch codes:
The HSD 575/72 provides an average service life of 3000 hours and and a color temperature of 7200K. We approve the improved version of lamp for use in the following fixtures.
- Exterior 600
- Exterior 600 Compact
- MAC 500
- MAC 600
- MAC 600 NT
- RoboScan Pro 918