produced before 2009 - 4000 switching cycles
produced after  2009 - 10000 switching cycles
 
The chart shows the warm up to full brightness when the ambient temperature is 21°C. Start-up is slower at low temperature, furthermore it can vary by + / -10% with regard to manufacturing tolerances. Due to meet new standards for the number of on/off cycles, we had to slow down the rise to full brightness.