Precise optics and a well engineered filament make this bulb a winner. I had 28 Martin SX500 Scanners in a nightclub and the bulbs that we used previously only lasted 50hours and were dim, with a warmer than usual light. 
 
These bulbs also provided a better focus for Gobos, so a tight image was possible. 
 
The price, was, as ever reasonable and non were broken in transit. 
 
Another top job by Thomann.