Temperature analysis of driver and optical behavior of LED lamps

This exploratory study was carried out with the objective to know optical behavior of light-emitting diode (LED) lamps used and temperature reached by electronic components that compose driver (electronic circuit situated inside body LED lamp) responsible convert electrical alternating current from power line direct operate devices. Then, two different experiments were lamps. In first experiment, 131 chosen randomly bought household appliances store (bargain market product) presenting nominal powers, 8, 10, 12 15 watts. All polarized at 127 V revealed behaviors, such as: not turn-on; flashing light (as strobe effect); effect) high intensity (more intense than normal); low (less fast turnon turn-off only; turn-on normal). The hypothesis for these behaviors can be attributed three behaviors: in turn-on, this failure dark spots are created on surface device. lamps, all devices electrically connected serial. When a is inoperative, interrupted devices; damage caused internal confined lamp during operation causing oscillations, as observed light, intensity, swelling electrolytic capacitors energy storage varying flow, other altered normal second temperatures located obtained revealing: 33 (lowest inductor) 52.5ºC (highest capacitor). These values represent ideal or condition components, but, when they operating body, found increased considerably. characteristic better evidenced strong color change (caused accumulative elapsed days used) printed board driver.