Reliability
Reliability describes the probability of a total failure of the Corona II module.
Reliability for example is influenced by design, mounting or environmental conditions. The measure of reliability is the Mean Time between Failure (MTBF). Only statistical errors without external influences are covered. The MTBF is calculated during special environmental conditions.
The MTBF of one Corona II module at a temperature of 80 °C is better than 300 years.
Durability
Durability describes the time, during which the Corona II module is usable with a certain amount of light emitting.
The light intensity of the LEDs decreases over time. The effect is influenced by the operating temperature of the LED chip.
Degradation of light over time at different temperatures
Service life of white LED
These values describe the service life of a white LED. For other LEDs, especially for UV LEDs, the service life might be lower.
parameter | values | ||
|---|---|---|---|
housing temperature [°C] | 40 | 60 | 75 |
soldering point temperature [°C] | 55 | 85 | 118 |
lumen maintenance @ 70 % power [h] | 77,000 | 51,000 | 40,000 |
life time @ 250 days operating per year [years] | 12.0 | 8.5 | 6.7 |