Abstract: An LED lighting device driven by boosting alternating current includes a mains AC input terminal, an LED lighting load, and an AC boosting driving circuit. The mains AC input terminal is configured to input mains electricity. The AC boosting driving circuit is electrically connected the mains AC input terminal and the LED lighting load, and is configured to perform forward boosting and reverse boosting for the mains electricity from the mains AC input terminal so that the voltage of the mains electricity is boosted to 1.5 to 6 times to be supplied to the LED lighting load. The LED lighting load achieves the same luminous efficiency, and the current flowing through the LED lighting load is reduced, thereby reducing the heat generated by the LED lighting load. The operating temperature of the LED lighting load is reduced. The service life is prolonged.

Abstract: A LED light emitting device includes a heat dissipating substrate, a heat reflective layer disposed on the heat dissipating substrate, a circuit unit disposed on the heat dissipating substrate and spaced apart from the heat reflective layer, and a LED chip unit insulatively disposed on the heat reflective layer and electrically connected to the circuit unit.