Causes Antibiotic resistance can also be introduced artificially into a microorganism through transformation protocols. This can be a useful way of implanting artificial genes into the microorganism. Antibiotic resistance is a consequence of evolution via natural selection.
How long do LEDs last? LEDs are notable for being extremely long-lasting products. Many LEDs have a rated life of up to 50,000 hours. This is approximately 50 times longer than a typical incandescent, 20-25 times longer than a typical halogen, and 8-10 times longer than a typical CFL. Used 12 hours a day, a 50,000 bulb will last more than 11 years. Used 8 hours a day, it will last 17 years!
Since an LED is a diode, even after it ceases to produce light, it will still use power. So it becomes more useful to discuss âlumen maintenanceâ with LEDs. Manufacturers often publish a curve of light output vs. time, which describes the LEDâs lumen maintenance profile. Indicator LEDs in clear epoxy packages can drop to 80% light output within a few thousand hours due to yellowing of the package material.